Cite

Bar. Gypsum, Kansas (591-451)

MLA

Plowden, David (1932). Bar. Gypsum, Kansas (591-451). Box 43. 1991 May. https://collections.library.yale.edu/catalog/2040988.

APA, 6th edition

Plowden, David (1932). (["Box 43"])(1991 May)[Bar. Gypsum, Kansas (591-451)]. https://collections.library.yale.edu/catalog/2040988.