Hrdlička. Bulletin of the American Museum of Natural History, XVI. 1902.

Upham. Science for August 29, 1902.

Williston. Science for August 1, 1902.

Winchell. American Geologist for September, 1902.

Holmes. Report of the Smithsonian Institution, 1903.

Hrdlička. American Anthropologist, vol. 5, n. s. 1903.

Peterson. Records of the Past, vol. 2. 1903.

Winchell. Bulletin of the Geological Society of America, XIV. 1903.

Sinclair. Publications of the University of California, 11, 1. 1904.

Munro. Archæological and False Antiquities. 1905.