K. Tilford, Bell, H., Kenah, T., and Yacoob, M.,
“CARE/Sierra Leone community participation assessment”, vol. no. 217. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. viii, 81 p., 1987.
K. Galway, Wolff, B., and Sturgis, R.,
“Child survival : risks and the road to health”. Institute for Resource Development/Westinghouse, Columbia, MD, USA, p. 101 p.: fig., map, tab., 1987.
M. J. F. van Pelt,
“De beoordeling van drinkwater- en sanitatieprojecten”. Netherlands Economic Institute (NEI), Rotterdam, The Netherlands, p. 15 p., 1987.
M. van Laar,
“De implementatie van sanitatie-projecten in Indonesie”. Leiden University, Leiden, The Netherlands, p. 111 p.: fig., 1987.