W. J. Gormley, Edwards, D. B., and Anthony, D.,
“Training in water and wastewater institutional programs : long-term, short-term and study tours”, vol. no. 117. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. i, 114 p., 1984.
D. B. Edwards, Keller, K., and Yohalem, D.,
“A workshop design for rainwater roof catchment systems : a training guide”, vol. no. 27. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. v, 313 p.: ill., 1984.