Cite

221. [Grass-Covered Prairies in Blackfeet Country.]

MLA

McClintock, Walter, 1870-1949. 221. [Grass-Covered Prairies in Blackfeet Country.]. Box 61, folder 3050. 1938. https://collections.library.yale.edu/catalog/2008494.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 61, folder 3050"])(1938)[221. [Grass-Covered Prairies in Blackfeet Country.]]. https://collections.library.yale.edu/catalog/2008494.