01101nam a2200277Ia 4500 IN-BaIIA 211028s9999 xx 000 0 eng d 0-387-91103-0 IIA Library 082.2:52 IAU-S45 International Astronomical Union International Astronomical Union Symposium 45th Leningard, U.S.S.R. 1970 Aug. 7-11 7178 The Motion, evolution of orbits, and origin of comets proceedings of the IAU symposium No.45, held in Leningard, USSR, August 4-11, 1970 edited by G. A. Chebotarev, E. I. Kazimirchak-Polanskaya and B. G. Marsdem Dordrecht D. Reidel Publishing 1972 xxiii, 521p. IAU Symposium; no. 45 Astronomy and Astrophysics Thesaurus Comets 755 Orbital Motions 7179 Stellar Motion 7180 Chebotarev, G. A., ed. 7181 Kazimirchak-Polanskaya, E. I., ed. 7182 Marsdem, B. G., ed. 7183 International Astronomical Union 7184 BK 4070 4070 0 0 0 0 BAN BAN GEN 1972-12-07 0 082.2:52/ IAU-S45 4542 2021-11-05 1972-12-07 BK Free