B. S. Dixit et Potts, P. W.,
« Laboratory testing of hand-operated water pumps », vol. no. 131. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. viii, 178 p., 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.
A. Pashkevich et Jones, A. L.,
« A workshop on handpump installation and maintenance in Riobamba, Ecuador : 17-27, 1983 », vol. no. 110. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. v, 19 p., 1984.