D. Donaldson,
“Operation and maintenace of rural drinking water and latrine programs in Honduras”, vol. no. 129. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, pp. v, 33p., p. C1-C108, 1984.
B. E. James,
“USAID handpump program in Ecuador”, vol. no. 123. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. vii, 90 p., 1984.