1. Bleasdale, A. (1961). Rainfall records and maps: Conference on surface water resources and the drought of 1959. J. Instn. Wat. Engrs., 15, 153–58.
2. Bleasdale, A. et al. (1963). Study and assessment of water resources, Conservation of Water Resources, Institution of Civil Engineers, London, pp. 121–36.
3. Boulton, A. G. (1967a). The measurement of flow, in River Management, (ed. P. C. G. Isaac ), Maclaren and Sons, London.
4. Boulton, A. G. (1967b). Surface water survey and modernisation: Informal dis- cussion of the Hydrological Group. Proc. Instn. Civ. Engrs., 36, 909–13.
5. Gilman, C. S. (1964). Rainfall, in Handbook of Applied Hydrology, (ed. V. T. Chow ), McGraw-Hill, New York.