"Looking diagonally upstream across dam from Nevada side near downstream toe. Low blocks in lower left corner are 'L' columns."

Chicago citation style
Department of the Interior. Bureau of Reclamation. Engineering and Research Center. 5/18/1981-3/4/1988. "Looking diagonally upstream across dam from Nevada side near downstream toe. Low blocks in lower left corner are 'L' columns.". 1933-07-27. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/293931. (Accessed September 21, 2018.)
APA citation style
Department of the Interior. Bureau of Reclamation. Engineering and Research Center. 5/18/1981-3/4/1988, (1933-07-27) "Looking diagonally upstream across dam from Nevada side near downstream toe. Low blocks in lower left corner are 'L' columns.". Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/293931
MLA citation style
Department of the Interior. Bureau of Reclamation. Engineering and Research Center. 5/18/1981-3/4/1988. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/293931>.
Note: These citations are programmatically generated and may be incomplete.