Pilot and Index Peaks looking over Clark's Fork Valley.

Chicago citation style
Sanborn. Pilot and Index Peaks looking over Clark's Fork Valley.. Retrieved from the Digital Public Library of America, http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll91/id/278. (Accessed July 13, 2020.)
APA citation style
Sanborn, Pilot and Index Peaks looking over Clark's Fork Valley.. Retrieved from the Digital Public Library of America, http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll91/id/278
MLA citation style
Sanborn. Retrieved from the Digital Public Library of America <http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll91/id/278>.
Note: These citations are programmatically generated and may be incomplete.