1. Official Methods of Analysis;AOAC,1984
2. Nutrient composition of distillers feeds;Carpenter,1970
3. Safety and efficacy of food processing sludges as animal feed: chemical characterization;Clevenger;Res. J. Water Pollut. Control Fed.,1990
4. Protein Quality Evaluation;FAO,1991
5. Forage Fiber Analyses (apparatus, reagents, procedures, and some applications);Goering;ARS, USDA, Handbook No. 379,1970