Washington, Govt. Print. Off., 1915-

New York, D. Van Nostrand company, 1925.

Boston: Printed for the Society of Natural History, 1905.

Ottawa: J. de L. Taché, 1920.

City of Washington: Smithsonian Institution, 1945.

book by Austin H. Clark and Leila F. Clark

Calcutta, Printed by order of the Trustees, 1912.

Baltimore, The William & Wilkins Company, 1930.