Copper mining. A tunnel and ore cars in the Isabella Mines, located in Polk County, Tennessee.

Chicago citation style
Copper mining. A tunnel and ore cars in the Isabella Mines, located in Polk County, Tennessee.. 1941 March 25. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/6149. (Accessed April 6, 2020.)
APA citation style
(1941 March 25) Copper mining. A tunnel and ore cars in the Isabella Mines, located in Polk County, Tennessee.. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/6149
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/6149>.
Note: These citations are programmatically generated and may be incomplete.