1. Association of American Feed Control Officials, 1984. Official Publication, Association of American Feed Control Officials, New York, pp. 63–65
2. Composted, deep stacked and ensiled broiler litter in sheep diets: chemical composition and nutritive value study. Virginia Polytechnic Institute and State University;Abdelmawla;Anim. Sci. Res. Rep. No.,1988
3. Anonymous, 1967. Standard Methods for the Examination of Dairy Products, 12th ed., Am. Public Health Assoc., New York, pp. 35–41
4. AOAC, 1988. Official Methods of Analysis, 15th ed., Assoc. of Official Anal. Chem., Washington, DC
5. Processing and handling of animal waste;Arndt;J. Anim. Sci.,1979