F5x7-48. Mountains, Trees, Grass, and Peak.
MLA
McClintock, Walter, 1870-1949. F5x7-48. Mountains, Trees, Grass, and Peak.. Box 148, folder 7890. undated. https://collections.library.yale.edu/catalog/10453536.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 148, folder 7890"])(undated)[F5x7-48. Mountains, Trees, Grass, and Peak.]. https://collections.library.yale.edu/catalog/10453536.