Ptolemy's catalogue of stars:
a revision of the Almagest /
by Christian Heinrich Friedrich Peters, and Edward Ball Knobel.

APA Citation

Ptolemy, a. 2nd century., Knobel, E. B. (Edward Ball)., Peters, C. H. F. (Christian Heinrich Friedrich). (1915). Ptolemy's catalogue of stars: a revision of the Almagest. [Washington, D.C.]: Carnegie Institution of Washington.

MLA Citation

Ptolemy, active 2nd century, E. B. (Edward Ball) Knobel, and C. H. F. (Christian Heinrich Friedrich) Peters. Ptolemy's Catalogue of Stars: a Revision of the Almagest. [Washington, D.C.]: Carnegie Institution of Washington, 1915.