9. Bear Grass.
MLA
McClintock, Walter, 1870-1949. 9. Bear Grass.. Box 70, folder 3874. 1905 1941. https://collections.library.yale.edu/catalog/2010668.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 70, folder 3874"])(1905 1941)[9. Bear Grass.]. https://collections.library.yale.edu/catalog/2010668.