M. Jorstad,
« The Buba-Tombali water project, Guinea Bissau : a process review ». UNDP PROWWESS (Promotion of the Role of Women in Water Supply and Sanitation), New York, NY, USA, p. 42 p.: fig., tab., 1986.
F. G. Driscoll,
Groundwater and wells, 2nd ed.ᵉ éd. St. Paul, MN, USA: Johnson Division, 1986, p. xv, 1089 p.: fig., photos, tab.
C. Lindblad,
« Project design and extension training in cement stave rainwater cistern constructions in Togo : Volume I », vol. no. 172. Water and Sanitation for Health Project (WASH), Washington, DC, USA, p. vi, 51 p.: fig., photogr., 1986.
USAID -Washington, DC, US, City, P. H. Water Reso, et Manila, P. H. Asia Found,
« Rural water supply : final report of a year's project ». San Carlos University, Cebu, Philippines, p. x, 90; 86; 56 p.: 3 vol., fig., 1986.