1. Anonymous 1963 The atlas of Britain and Northern Ireland, Clarendon Press, Oxford.
2. ALBEDO VARIATIONS IN SOUTHERN HAMPSHIRE AND DORSET
3. 1956 The heat balance of the earth's surface, (translated by N. A. Stepanova, 1958), U.S. Weather Bureau, Washington.
4. and 1963 Int. Ass. Sci. Hydrol., Committee for Evaporation, No. 62, p. 190.