A statistical investigation of cometary orbits
By: by William H. Pickering ... Printed from the Sturgis fund
Series: Annals of the Astronomical Observatory of Harvard College -- v. 61, pt. 3
Publisher: The Observatory
Published: 1911
Place of publication: Cambridge, Mass
Language: eng
Number of pages: 373
Subjects: Comets; Orbits
Notes: Appendix: A photographic search for planet O: p. [369]-373.