Speculator Mine Engine Room

Chicago citation style
Unknown. Speculator Mine Engine Room. 1970. Retrieved from the Digital Public Library of America, http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll3/id/69. (Accessed July 12, 2020.)
APA citation style
Unknown, (1970) Speculator Mine Engine Room. Retrieved from the Digital Public Library of America, http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll3/id/69
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll3/id/69>.
Note: These citations are programmatically generated and may be incomplete.