00579nam a2200169Ia 4500003000900000008004100009040001600050080001800066100002400084245004700108260005800155490005200213650002500265942000700290999001700297952009500314IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a083.8:52bPOR  aPorter, J. E935760 0aCatalogue of cometary orbitscJ. E. Porter  aHounslow WestbBritish Astronomical Associationc1961  aMemoirs of the british Astronomical Association  aComets-Orbits935761  cBK  c18678d18678  00104070aBANbKODcGENd2013-05-07l0o083.8:52/ PORp19600r2021-11-05w2013-05-07yBK