00537nam a2200169Ia 4500003000900000008004100009040001600050080002200066100002300088245008600111260006800197300001300265650001500278650004100293650001100334650002200345IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a523.64:521.9bCOM  aYeomans, Donald K. 0aCometary astrometrycDonald K. Yeomans                                             aCaliforniabNational Aeronautics and Space Administrationc1984  av, 220p.  aAstrometry  aAstronomy and astrophysics thesaurus  aComets  aPlanetary systems