10-foot section of Douglas fir log, completely fossilized. at Ginkgo State Park near Vantage

Chicago citation style
Curtis, Asahel, 1874-1941. 10-foot section of Douglas fir log, completely fossilized. at Ginkgo State Park near Vantage. ca. 1935. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/curtis/id/695. (Accessed July 19, 2018.)
APA citation style
Curtis, Asahel, 1874-1941, (ca. 1935) 10-foot section of Douglas fir log, completely fossilized. at Ginkgo State Park near Vantage. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/curtis/id/695
MLA citation style
Curtis, Asahel, 1874-1941. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/curtis/id/695>.
Note: These citations are programmatically generated and may be incomplete.