Concrete blocks inside a caisson, Tacoma Narrows Bridge construction, ca. 1939

Chicago citation style
[probably Simmer]. Concrete blocks inside a caisson, Tacoma Narrows Bridge construction, ca. 1939. ca. 1939. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/farquharson/id/92. (Accessed October 15, 2018.)
APA citation style
[probably Simmer], (ca. 1939) Concrete blocks inside a caisson, Tacoma Narrows Bridge construction, ca. 1939. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/farquharson/id/92
MLA citation style
[probably Simmer]. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/farquharson/id/92>.
Note: These citations are programmatically generated and may be incomplete.