00418nam a2200145Ia 4500003000900000008004100009020001800050040001600068080001600084100002000100245007900120260004800199300001400247650001100261IN-BaIIA211028s9999    xx            000 0 eng d  a0-521-64600-6  cIIA Library  a523.64bBUR  aBurnham, Robert 0aGreat cometscRobert. Burnham                                               aCambridgebCambridge University Pressc2000  aix, 228p.  aComets