Cite

Bar. Gypsum, Kansas (591-451)

MLA

Plowden, David. Bar. Gypsum, Kansas (591-451). 1991. https://collections.library.yale.edu/catalog/2040988.

APA, 6th edition

Plowden, D. (1991). Bar. Gypsum, Kansas (591-451) [Gelatin silver prints, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2040988.