Cite

Dropping down the steep wall of Kern Canyon. 139

MLA

Dropping down the Steep Wall of Kern Canyon. 139. 0AD. https://collections.library.yale.edu/catalog/2016753.

APA, 6th edition

Dropping down the steep wall of Kern Canyon. 139. (0 C.E.). [Photographic prints, Photographs, Stereographs]. https://collections.library.yale.edu/catalog/2016753.