R. D. Fannon,
“Final research and testing of a water hand pump for use in developing countries, to Agency for International Development, January 31, 1975”, vol. Contract no. AID/csd-3305, project no. 931-17-521-454. Battelle Memorial Institute, Columbus, OH, USA, p. 21 p. : 2 fig., 4 tab., 1975.
V. Vitayaudom,
“Iron removal from water supplies”, vol. no. 189. Asian Institute of Technology, Bangkok, Thailand, p. xii + 135 p. : 21 tabs., 30 figs., refs., 1975.