P. L. M.,
“Letrinas sanitarias aboneras a base de tambor : Chile”, in
Saneamiento alternativo o alternativas al saneamiento : actas del 1er seminario latinoamericano sobre saneamiento alternativo, Medellin, Colombia, Julio 24-29 de 1987, 1988, pp. P. 89-104 : fig.
S. E. S. I. D. A. - Stockholm,
“Manual for improvement of traditional water sources”. Health through Sanitation and Water (HESAWA), Bukoba, Tanzania, p. 14 p.: ill., tab., 1988.
UNDP -New York, NY, US,
“Roof catchments, roof coverings, guttering, downpipes”. UNDP Department of Technical Cooperation for Development, Suva, Fiji, p. 49 p.: fig., 1988.
R. Stark,
“Well construction manual”. Sarvodaya Rural Technical Services, Moratuwa, Sri Lanka, p. 26 p.: fig., 1988.