Concrete production, probably King County, ca. 1934

Chicago citation style
Curtis, Asahel, 1874-1931. Concrete production, probably King County, ca. 1934. ca. 1934. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/civilworks/id/76. (Accessed August 18, 2018.)
APA citation style
Curtis, Asahel, 1874-1931, (ca. 1934) Concrete production, probably King County, ca. 1934. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/civilworks/id/76
MLA citation style
Curtis, Asahel, 1874-1931. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/civilworks/id/76>.
Note: These citations are programmatically generated and may be incomplete.