Harvard catalogue of photographic magnitudes of bright stars north of +57⁰.5 /
Cecilia H. Payne, Harlow Shapley.

APA Citation

Gaposchkin, C. Helena Payne., Shapley, H., Harvard College Observatory. (1933). Harvard catalogue of photographic magnitudes of bright stars north of +57⁰.5. Cambridge, Mass.: [Harvard College Observatory?].

MLA Citation

Gaposchkin, Cecilia Helena Payne, 1900-, Harlow Shapley, and Harvard College Observatory. Harvard Catalogue of Photographic Magnitudes of Bright Stars North of +57⁰.5. Cambridge, Mass.: [Harvard College Observatory?], 1933.

Warning: These citations may not always be complete (especially for serials).