81530. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4535.   Softbound, usual signs of use, text in very good condition.    $5.00

81516. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 214, Number 4523.   Softbound, usual signs of use, text in very good condition.    $5.00

81517. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 214, Number 4525.   Softbound, usual signs of use, text in very good condition.    $5.00

81518. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 214, Number 4526.   Softbound, usual signs of use, text in very good condition.    $5.00

81519. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 214, Number 4527.   Softbound, usual signs of use, text in very good condition.    $5.00

81520. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4528.   Softbound, usual signs of use, text in very good condition.    $5.00

81521. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4529.   Softbound, usual signs of use, text in very good condition.    $5.00

81522. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4530.   Softbound, usual signs of use, text in very good condition.    $5.00

81526. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4531.   Softbound, usual signs of use, text in very good condition.    $5.00

81527. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4532.   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

81529. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4534.   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

81531. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4536.   Softbound, usual signs of use, text in very good condition.    $5.00

81532. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4537.   Softbound, usual signs of use, text in very good condition.    $5.00

81534. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4539.   Softbound, usual signs of use, text in very good condition.    $5.00

81535. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4540.   Softbound, usual signs of use, text in very good condition.    $5.00

81536. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 216, Number 4541.   Softbound, usual signs of use, text in very good condition.    $5.00

81537. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 216, Number 4543.   Softbound, usual signs of use, text in very good condition.    $5.00

81539. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 216, Number 4545.   Softbound, usual signs of use, text in very good condition.    $5.00

81540. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 216, Number 4546.   Softbound, usual signs of use, text in very good condition.    $5.00

81541. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 216, Number 4547.   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

81528. AAAS.   Science.   American Association for the Advancement of Science, 1982, Science, Volume 215, Number 4533.   Softbound, usual signs of use, text in very good condition.    $5.00

81494. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4508.   Softbound, usual signs of use, text in very good condition.    $5.00

81836. AAAS.   Science.   American Association for the Advancement of Science, 1987, Science, Volume 238, Number 4834.   Softbound, usual signs of use, text in very good condition.    $5.00

81479. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4496.   Softbound, usual signs of use, text in very good condition.    $5.00

81482. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4497.   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

81484. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4499.   Softbound, usual signs of use, text in very good condition.    $5.00

81485. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4500.   Softbound, usual signs of use, text in very good condition.    $5.00

81486. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4501.   Softbound, usual signs of use, text in very good condition.    $5.00

81487. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4502.   Softbound, usual signs of use, text in very good condition.    $5.00

81488. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4503.   Softbound, usual signs of use, text in very good condition.    $5.00

81491. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4505.   Softbound, usual signs of use, text in very good condition.    $5.00

81515. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 214, Number 4522.   Softbound, usual signs of use, text in very good condition.    $5.00

81493. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4507.   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

81495. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4509.   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

81502. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4511.   Softbound, usual signs of use, text in very good condition.    $5.00

81503. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4512.   Softbound, usual signs of use, text in very good condition.    $5.00

81505. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4513.   Softbound, usual signs of use, text in very good condition.    $5.00

81507. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4514.   Softbound, usual signs of use, text in very good condition.    $5.00

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

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

81492. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 213, Number 4506.   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