CTA -Wageningen, NL, Technical Centre for Agricultural and Rural Cooperation ACP-EU, Paris, F. R. G. R. E. T. -, y 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.
