00976nam a2200241Ia 4500003000900000008004100009040001600050080002300066111008500089245021600174260006800390300001500458490004100473500002600514650004100540650001100581700001800592700002400610700002200634700002100656700001900677710003800696IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a523.64(082.2)bDON  aInternational Astronomical Union Colloquiumn25thcMarylandd1974 Oct. 28-Nov. 1 4aThe study of cometsbpt. 1, proceedings of IAU colloquium No.25 held at Goddard Space Flight center, Greenbelt, Maryland October 28-November 1,1974cedited by Donn, B....[et al.]                                   aWashingtonbNational Aeronautics and Space Administrationc1976  axii, 536p.  aNASA SP; 393, IAU Colloquium; no. 25  aDonated by Mrs. Bappu  aAstronomy and Astrophysics Thesaurus  aComets  aDonn, B., ed.  aHarrington, R., ed.  aHearn, M. A., ed.  aJackson, W., ed.  aMumma, M., ed.  aInternational Astronomical Union