1. MAFF, Fertilizer recommendations for agricultural and horticultural crops 1967, NAAS Advisory Paper 4.
2. MAFF, Fertilizer recommendations 1973, Bull. 209, London, HMSO.
3. MAFF, Experiments, studies and surveys 1966, NAAS South-East Region.
4. MAFF, Experiments, studies and surveys 1967, NAAS South-East Region.
5. MAFF, Experiments, studies and surveys 1968, NAAS South-East Region.