1. ANON. (1972).Apples. Bulletin 207. Ministry of Agriculture, Fisheries and Food, London.
2. BEAKBANE, A. B., CHAPELOW, H. C. and GRUBB, N. H. (1935). Periods of blossoming of some trees and soft fruit varieties at East Mailing.Report, East Mailing Research Station for 1934, 100–14.
3. POTTER, J. M. S. (1944).Report of National Fruit Trials for 1921–1944, 27–9.