APA

Ives R. L., . (1942). Early human occupation of the colorado headwaters region an archeological reconnaissance. New York-US: Geografical record.

Chicago

Ives Ronald L, . 1942. Early human occupation of the colorado headwaters region an archeological reconnaissance. New York-US: Geografical record.

Harvard

Ives R. L., . (1942). Early human occupation of the colorado headwaters region an archeological reconnaissance. New York-US: Geografical record.

MLA

Ives Ronald L, . Early human occupation of the colorado headwaters region an archeological reconnaissance. New York-US: Geografical record. 1942.