01011nam a2200229Ia 4500003000900000008004100009040001600050080002300066111009200089245023900181260006800420300001600488490001700504500002600521650004100547650001600588700001800604710003800622942000700660999001500667952009900682IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a523.64(082.2)bDON  aInternational Astronomical Union Colloquiumn25thcMarylandd1974 Oct. 28-Nov. 1912882 4aThe study of cometsbpt. 1, proceedings of the International Astronomical Union Colloquium No.25, Co-sponsored by COSPAR and held at Goddard Space Flight Center, Green Belt, Maryland, October 28-November 1, 1974cedited by B. Donn      aWashingtonbNational Aeronautics and Space Administrationc1976  axxii, 536p.  aNASA SP; 393  aDonated by Mrs. Bappu  aAstronomy and Astrophysics Thesaurus  aComets9755  aDonn, B., ed.  aInternational Astronomical Union   cBK  c7612d7612  00104070aBANbKAVcGENd1983-07-21l0o523.64(082.2)/ DONp8426r2021-11-05w1983-07-21yBK