1. Report of the A.O.U. Committee on Bird Protection for 1943;Allen;Auk,1944
2. Allen, R.P., 1952. The Whooping Crane. Research Report 3. National Audubon Society, New York.
3. Allen, R.P., 1956. A Report on the Whooping Cranes’ Northern Breeding Grounds: A Supplement to Research Report No. 3, The Whooping Crane. National Audubon Society, New York, pp. 1–60.
4. Archibald, G.W., Pasquier, R.F. (Eds.), 1987. Proceedings of the International Crane Workshop, 1983. International Crane Foundation, Baraboo, WI, p. 595.
5. Revisiting the historic distribution and habitats of the whooping crane (Chapter 3);Austin,2018