81510. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 214, Number 4516.   Softbound, usual signs of use, text in very good condition.    $5.00

81511. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 214, Number 4518.   Softbound, usual signs of use, text in very good condition.    $5.00

81512. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 214, Number 4519.   Softbound, usual signs of use, text in very good condition.    $5.00

81513. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 214, Number 4520.   Softbound, usual signs of use, text in very good condition.    $5.00

81514. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 214, Number 4521.   Softbound, usual signs of use, text in very good condition.    $5.00

81544. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 216, Number 4550.   Softbound, usual signs of use, text in very good condition.    $5.00

81483. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4498.   Softbound, usual signs of use, text in very good condition.    $5.00

81496. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4510.   Softbound, usual signs of use, text in very good condition.    $5.00

81610. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 221, Number 4616.   Softbound, usual signs of use, text in very good condition.    $5.00

81542. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 216, Number 4548.   Softbound, usual signs of use, text in very good condition.    $5.00

81572. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 219, Number 4580.   Softbound, usual signs of use, text in very good condition.    $5.00

81573. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 219, Number 4581.   Softbound, usual signs of use, text in very good condition.    $5.00

81574. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 219, Number 4582.   Softbound, usual signs of use, text in very good condition.    $5.00

81575. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 219, Number 4583.   Softbound, usual signs of use, text in very good condition.    $5.00

81576. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 219, Number 4584.   Softbound, usual signs of use, text in very good condition.    $5.00

81577. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 219, Number 4585.   Softbound, usual signs of use, text in very good condition.    $8.00

81580. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 219, Number 4587.   Softbound, usual signs of use, text in very good condition.    $5.00

81582. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 219, Number 4589.   Softbound, usual signs of use, text in very good condition.    $5.00

81583. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 219, Number 4590.   Softbound, usual signs of use, text in very good condition.    $5.00

81570. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 218, Number 4578.   Softbound, usual signs of use, text in very good condition.    $5.00

81609. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 221, Number 4615.   Softbound, usual signs of use, text in very good condition.    $5.00

81569. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 218, Number 4577.   Softbound, usual signs of use, text in very good condition.    $5.00

81611. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 221, Number 4617.   Softbound, usual signs of use, text in very good condition.    $5.00

81612. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 221, Number 4618.   Softbound, usual signs of use, text in very good condition.    $5.00

81613. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 222, Number 4619.   Softbound, usual signs of use, text in very good condition.    $5.00

81614. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 222, Number 4620.   Softbound, usual signs of use, text in very good condition.    $5.00

81615. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 222, Number 4621.   Softbound, usual signs of use, text in very good condition.    $5.00

81616. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 222, Number 4622.   Softbound, usual signs of use, text in very good condition.    $5.00

81617. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 222, Number 4623.   Softbound, usual signs of use, text in very good condition.    $5.00

81618. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 222, Number 4624.   Softbound, usual signs of use, text in very good condition.    $5.00

81619. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 222, Number 4625.   Softbound, usual signs of use, text in very good condition.    $5.00

81620. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 222, Number 4626.   Softbound, usual signs of use, text in very good condition.    $5.00

81586. AAAS.   Science.   American Association for the Advancement of Science, 1983, Science, Volume 219, Number 4591.   Softbound, usual signs of use, text in very good condition.    $5.00

81557. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4563.   Softbound, usual signs of use, text in very good condition.    $5.00

81477. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4494.   Softbound, usual signs of use, text in very good condition.    $5.00

81545. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 216, Number 4551.   Softbound, usual signs of use, text in very good condition.    $5.00

81547. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 216, Number 4553.   Softbound, usual signs of use, text in very good condition.    $5.00

81548. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4554.   Softbound, usual signs of use, text in very good condition.    $5.00

81549. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4555.   Softbound, usual signs of use, text in very good condition.    $5.00

81550. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4556.   Softbound, usual signs of use, text in very good condition.    $5.00

81551. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4557.   Softbound, usual signs of use, text in very good condition.    $5.00

81552. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4558.   Softbound, usual signs of use, text in very good condition.    $5.00

81553. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4559.   Softbound, usual signs of use, text in very good condition.    $5.00

81554. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4560.   Softbound, usual signs of use, text in very good condition.    $5.00

81571. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 218, Number 4579.   Softbound, usual signs of use, text in very good condition.    $5.00

81556. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4562.   Softbound, usual signs of use, text in very good condition.    $5.00

81543. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 216, Number 4549.   Softbound, usual signs of use, text in very good condition.    $5.00

81558. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4564.   Softbound, usual signs of use, text in very good condition.    $5.00

81559. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4565.   Softbound, usual signs of use, text in very good condition.    $5.00

81560. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 217, Number 4566.   Softbound, usual signs of use, text in very good condition.    $5.00