Cite

Mountainous countryside, Gansu Province, China, ca. 1926

MLA

Caldwell, Mary W. Mountainous Countryside, Gansu Province, China, Ca. 1926. 1926. https://collections.library.yale.edu/catalog/11423941.

APA, 6th edition

Caldwell, M. W. (1926). Mountainous countryside, Gansu Province, China, ca. 1926 [Photographs (AAT), topographical views (AAT)]. https://collections.library.yale.edu/catalog/11423941.