“Educational handbook for health personnel”
, vol. no. 35. World Health Organization (WHO), Geneva, Switzerland, p. 348 p., 1987.
“Training of trainers in operations and maintenance for rural potable water systems in Bolivia”
, vol. no. 202. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. iii, 50 p.: tab., 1987.