00472nam a2200157Ia 4500 IN-BaIIA 211028s9999 xx 000 0 eng d IIA Library 083.8:52 POR Porter, J. E 35760 Catalogue of cometary orbits J. E. Porter Hounslow West British Astronomical Association 1961 Memoirs of the british Astronomical Association Comets-Orbits 35761 BK 18678 18678 0 0 0 0 BAN KOD GEN 2013-05-07 0 083.8:52/ POR 19600 2021-11-05 2013-05-07 BK