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.
M. McGarry, Mackenzie, E., et Latham, B.,
« Working together for better water ». Foundation for International Training for Third World Countries, Toronto, Ont, Canada, p. 82 p.: ill., 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.