1. The Nutrient Requirements of Farm Livestock, No. 3, Pigs;Agricultural Research Council,1967
2. The Animal as a Converter of Matter and Energy;Armsby,1925
3. Official Methods of Analysis of the A.O.A.C.,1965
4. The use of fats in pig feeding;Bayley;J. Agric. Sci., Camb.,1965
5. The use of digestible energy in the evaluation of pig diets;Cole,1974