1. Studies on farm livestock wastes;Anon,1976
2. Standard methods for the examination of water and waste water;APHA,1971
3. Volatile fatty acids in stored animal slurry;Cooper;J. Sci. Food and Agric.,1978
4. Characteristics of slurry from fattening pigs and comparisons with slurry from laying hens;Evans;Agric. and Environ.,1978
5. Zirconium dioxide and cupric sulphate—new catalyst in the Kjeldahl method for total nitrogen determination;Glowa;Journal of the Association of Official Agricultural Chemists,1974