01008nam a2200253Ia 4500003000900000008004100009020001800050040001600068080002200084110003700106111009000143245021800233260004200451300001700493490002600510650004100536650001100577650002000588650001900608700002700627700003900654700002400693710003700717IN-BaIIA211028s9999    xx            000 0 eng d  a0-387-91103-0  cIIA Library  a082.2:52bIAU-S45  aInternational Astronomical Union  aInternational Astronomical Union Symposiumn45thcLeningard, U.S.S.R.d1970 Aug. 7-11 4aThe Motion, evolution of orbits, and origin of cometsbproceedings of the IAU symposium No.45, held in Leningard, USSR, August 4-11, 1970cedited by G. A. Chebotarev, E. I. Kazimirchak-Polanskaya and B. G. Marsdem  aDordrechtbD. Reidel Publishingc1972  axxiii, 521p.  aIAU Symposium; no. 45  aAstronomy and Astrophysics Thesaurus  aComets  aOrbital Motions  aStellar Motion  aChebotarev, G. A., ed.  aKazimirchak-Polanskaya, E. I., ed.  aMarsdem, B. G., ed.  aInternational Astronomical Union