Catalogue of cometary orbits, equinox 1950·0
Subtitle: fourth report of the Computing Section
By: compiled under the directorship of J.G. Porter
Series: British Astronomical Association. Memoirs -- v. 39, no. 3, June 1961
Published: 1961
Place of publication: London
Language: eng
Number of pages: 97
Notes: "Planned as an extension of Galle's Cometenbalmen."

Bibliography: p. 66-80.