H. de Zeeuw, Waters-Bayer, A., et van Veldhuizen, L.,
« Developing technology with farmers : a trainer's guide for participatory learning ». ZED Books, London, UK, p. ix, 230 p. : boxes, fig., ill., tab., 1997.
B. D. N. G. O. Forum Dhaka,
« Final report on primary school teachers'' training on sanitation awareness ». NGO Forum for Drinking Water Supply and Sanitation, Dhaka, Bangladesh, p. ii, 55 p. + annexes (17 p.) : photogr., tab., 1997.
T. Batse,
« Trainer's guide for DWST training ». Community Water and Sanitation Agency, Accra, Ghana, p. iv, 89 p. : ill., 1997.