1. Calvert, C. C., N. O. Morgan and H. J. Eby, 1971. Biodegraded hen manure and adult houseflies: Their nutritional value to the growing chick. Proc. Int. Symp. on Livestock Wastes. Livestock Waste Management and Pollution Abatement, p. 319-320.
2. Housefly larvae: Biodegradation of hen excreta to useful products;Calvert;Poultry Sci.,1970
3. Factors modifying the excretion of fecal androgens in the cow;Casady;J. Dairy Sci.,1949
4. The estrone content of hen's urine;Common;Can. J. Biochem.,1965
5. Fecal excretion of androgens by the dairy cow during pregnancy;Gassner;Fed. Proc.,1947