1. H. M. Forestry Commissioners, 1943, Cmd. 6447
2. & , ‘Problems in Tree Nutrition’, 1944 (London: Faber & Faber)
3. Rep. Rothamst. exp. Sta. for 1949, 1950, p. 122;
4. Rep. For. Res. Lond. for 1948-9, 1950, p. 60;
5. Rep. For. Res. Lond. for 1948-9, for 1949-50, 1951, p. 97