81474. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4491.   Softbound, usual signs of use, text in very good condition.    $5.00

81461. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 211, Number 4478.   Softbound, usual signs of use, text in very good condition.    $5.00

81462. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 211, Number 4479.   Softbound, usual signs of use, text in very good condition.    $5.00

81463. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 211, Number 4480.   Softbound, usual signs of use, text in very good condition.    $5.00

81465. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 211, Number 4482.   Softbound, usual signs of use, text in very good condition.    $5.00

81466. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 211, Number 4484.   Softbound, usual signs of use, text in very good condition.    $5.00

81467. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 211, Number 4485.   Softbound, usual signs of use, text in very good condition.    $5.00

81468. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 211, Number 4486.   Softbound, usual signs of use, text in very good condition.    $5.00

81469. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 211, Number 4487.   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

81473. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4490.   Softbound, usual signs of use, text in very good condition.    $5.00

81458. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4475.   Softbound, usual signs of use, text in very good condition.    $5.00

81475. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4492.   Softbound, usual signs of use, text in very good condition.    $5.00

81476. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4493.   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

81478. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 212, Number 4495.   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

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

81470. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 211, Number 4488.   Softbound, usual signs of use, text in very good condition.    $5.00

81449. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4465.   Softbound, usual signs of use, text in very good condition.    $5.00

81433. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 208, Number 4451.   Softbound, usual signs of use, text in very good condition.    $5.00

81434. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4452.   Softbound, usual signs of use, text in very good condition.    $5.00

81435. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4453.   Softbound, usual signs of use, text in very good condition.    $5.00

81436. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4454.   Softbound, usual signs of use, text in very good condition.    $5.00

81438. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4456.   Softbound, usual signs of use, text in very good condition.    $5.00

81441. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4459.   Softbound, usual signs of use, text in very good condition.    $5.00

81442. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4460.   Softbound, usual signs of use, text in very good condition.    $5.00

81443. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4461.   Softbound, usual signs of use, text in very good condition.    $5.00

81445. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4462.   Softbound, usual signs of use, text in very good condition.    $5.00

81460. AAAS.   Science.   American Association for the Advancement of Science, 1981, Science, Volume 211, Number 4477.   Softbound, usual signs of use, text in very good condition.    $5.00

81448. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4464.   Softbound, usual signs of use, text in very good condition.    $5.00

81459. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4476.   Softbound, usual signs of use, text in very good condition.    $5.00

81450. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4466.   Softbound, usual signs of use, text in very good condition.    $5.00

81451. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4467.   Softbound, usual signs of use, text in very good condition.    $5.00

81452. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4468.   Softbound, usual signs of use, text in very good condition.    $5.00

81453. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4470.   Softbound, usual signs of use, text in very good condition.    $5.00

81454. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4471.   Softbound, usual signs of use, text in very good condition.    $5.00

81455. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4472.   Softbound, usual signs of use, text in very good condition.    $5.00

81456. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4473.   Softbound, usual signs of use, text in very good condition.    $5.00

81457. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 210, Number 4474.   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

81447. AAAS.   Science.   American Association for the Advancement of Science, 1980, Science, Volume 209, Number 4463.   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

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