"Drilling on east abutment."

Chicago citation style
Department of the Interior. Bureau of Reclamation. Engineering and Research Center. 5/18/1981-3/4/1988. "Drilling on east abutment.". 1935. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/293960. (Accessed June 21, 2018.)
APA citation style
Department of the Interior. Bureau of Reclamation. Engineering and Research Center. 5/18/1981-3/4/1988, (1935) "Drilling on east abutment.". Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/293960
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/293960>.
Note: These citations are programmatically generated and may be incomplete.