1. AOAC, 1984. Official Methods of Analysis, 14th Edition. Association of Official Analytical Chemists, Arlington, VA, pp. 129–130.
2. Feather and hair meals for ruminants. 1. Effect of degree of processing on utilization of feather meal;Aderibigbe;J. Anim. Sci.,1983
3. ASTM, 1988. D584-90 Standard Test Method for Wool Content of Raw Wool-Laboratory Scale. Annual Book of ASTM Standards, Method D2720-77. American Society for Testing and Materials, Philadelphia, PA.
4. Black, J.L., 1987. Mechanisms controlling the rate of growth, composition and morphology of wool. In: McGuirk, B.J. (Ed.), Merino Improvement Programs in Australia. Australian Wool Corporation, Melbourne, Australia, pp. 457–480.
5. Automated simultaneous determination of ammonia and total amino acids in ruminal fluid and in vitro media;Broderick;J. Dairy Sci.,1980