SF-202. Bear Grass.
MLA
McClintock, Walter, 1870-1949. SF-202. Bear Grass.. Box 146, folder 7642. undated. https://collections.library.yale.edu/catalog/10453787.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 146, folder 7642"])(undated)[SF-202. Bear Grass.]. https://collections.library.yale.edu/catalog/10453787.