Observatory circulars

Chicago citation style
Johannesburg (South Africa). Union Observatory. Observatory circulars. 1912-19uu. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/000528112. (Accessed December 19, 2018.)
APA citation style
Johannesburg (South Africa). Union Observatory, (1912-19uu) Observatory circulars. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/000528112
MLA citation style
Johannesburg (South Africa). Union Observatory. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/000528112>.
Note: These citations are programmatically generated and may be incomplete.