1. Registration of pesticides in the United States: Proposed guidelines;U.S. Environmental Protection Agency.;Fed. Reg.,1978
2. Bell, D.J. and B.M.Freeman, eds. 1971. Physiology and Biochemistry of the Domestic Fowl, Vol. 2. Academic Press, New York, NY.
3. Sturkie, P.D., ed. 1976. Avian Physiology, 3rd ed. Cornell University Press, Ithaca, NY.