Catalog of copyright entries, third series. Part 6, Maps and atlases

Chicago citation style
Library of Congress. Copyright Office. Catalog of copyright entries, third series. Part 6, Maps and atlases. 1951-1977. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/102290541. (Accessed November 14, 2018.)
APA citation style
Library of Congress. Copyright Office, (1951-1977) Catalog of copyright entries, third series. Part 6, Maps and atlases. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/102290541
MLA citation style
Library of Congress. Copyright Office. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/102290541>.
Note: These citations are programmatically generated and may be incomplete.