00489nam a2200169Ia 4500003000900000008004100009020001800050040001600068080001600084100002100100245008700121260004800208300001400256650002100270650001100291650001700302IN-BaIIA211028s9999    xx            000 0 eng d  a0-521-32440-8  cIIA Library  a523.64bWHI  aWhipple, Fred L. 4aThe mystery of cometscFred L. Whipple                                              aCambridgebCambridge University Pressc1985  axi, 276p.  aComet landscapes  aComets  aHalley comet