“Four decades of latrine development”
. UNICEF Regional Office for East Asia and Pacific, Bangkok, Thailand, p. 71 p.: fig., tab., photogr., 1988.
“Water and sanitation : CIDA development issues paper”
. Canadian International Development Agency, CIDA, Hull, Que, Canada, p. ca. 200 p.: fig., tab., 1988.
“Water supply and sanitation in fast growing cities”
, in Water supply in fast growing cities : Amsterdam, 19-21 September 
, 1988, p. 20 p.: fig., tab.