APA

(1941). Joint meeting of A.A.A.S. and A.A.G. at philadelphia. New York-US: Geografical record.

Chicago

1941. Joint meeting of A.A.A.S. and A.A.G. at philadelphia. New York-US: Geografical record.

Harvard

(1941). Joint meeting of A.A.A.S. and A.A.G. at philadelphia. New York-US: Geografical record.

MLA

Joint meeting of A.A.A.S. and A.A.G. at philadelphia. New York-US: Geografical record. 1941.