00652nam a2200205Ia 4500 IN-BaIIA 211028s9999 xx 000 0 eng d IIA Library 082.2:52 IAU-C25:1 Donn, B. 9417 The study of comets pt. 1 B. Donn.. [et al.] Washington National Aeronautics and Space Administration 1976 [various pagings.] Astronomy and astrophysics thesaurus Comets 755 A'Hearn, M. 9418 Jackson, W. 9419 Mumma, M. 9420 BK 5414 5414 0 0 0 0 BAN BAN GEN 1977-03-07 0 082.2:52/ IAU-C25:1 6052 2021-11-05 1977-03-07 BK