Biblio

G. B. I. T. D. G. - London, “Wind pumping : ITDG brief”, Appropriate technology, pp. p. 34-38 : 3 fig., 2004.

CTA -Wageningen, NL, Technical Centre for Agricultural and Rural Cooperation ACP-EU, Paris, F. R. G. R. E. T. -, and London, G. B. I. T. D. G. -, “Tools for agriculture : a guide to appropriate equipment for smallholder farmers”. IT Publications, London, UK, p. viii, 238 p.: fig., tab., ill., photogr., 1992.

G. B. I. T. D. G. - London and London, G. B. Halcrow Gr, “Small-scale solar-powered pumping systems : the technology : its economics and advancement : main report”. Halcrow Group, London, UK, p. 297 p. in various pagings: fig., tab., 1983.