1. Official Methods of Analysis;AOAC,1984
2. Near infra-red spectra of ammoniatreated straw and of isolated cell walls;Barnes;J. Anim. Sci.,1988
3. Use of poultry litter as a feed and fertilizer;Barton,1990
4. Processing of animal waste by feeding to ruminants;Fontenot,1980
5. Forage Fiber Analyses;Goering;ARS, USDA Agricultural Handbook No. 379,1970