1. The Nutrient Requirements of Farm Livestock. No. 2. Ruminants;Agricultural Research Council,1965
2. Plant nutrient content of rainwater;Allen;J. Ecol.,1968
3. Agriculture and the Quality of Our Environment;American Association for the Advancement of Science,1967
4. Implications of the permit program in the poultry and animal feeding industry;Anderson,1972
5. Proceedings of the Institute of Civil Engineers of Ireland,1970