1. ADAS , (1976 ) EHF Results-Fodder Crops, Grassland and Fodder Conservation , Vol. 24 , Part 5, pp.59 -67 . Ministry of Agriculture, Fisheries and Food, Agricultural Development and Advisory Service.
2. ADAS , (1977 ) EHF Results-Fodder Crops, Grassland and Fodder Conservation , Vol. 24 , Part 6, pp.37 -41 . Ministry of Agriculture, Fisheries and Food, Agricultural Development and Advisory Service.
3. ADAS, East Midland Region (1978 ) Research and Development. Summary Report 1978-Agriculture , pp.66 -67 . Ministry of Agriculture, Fisheries and Food, Agricultural Development and Advisory Service, East Midland Region.
4. ADAS, South East Region (1976 ) Development Report South East Region. Livestock and Forage Crops-Summary of Experiments, Studies and Surveys, 1976 , p.39 . Ministry of Agriculture, Fisheries and Food, Agricultural Development and Advisory Service.
5. ADAS, South East Region (1977 ) Development Report South East Region. Livestock and Forage Crops-Summary of Experiments, Studies and Surveys 1977 , pp.49 -51 . Ministry of Agriculture, Fisheries and Food, Agricultural Development and Advisory Service.