C. I. Miller,
“Sociocultural and economic characteristics of conditions in Ancash and La Libertad, Peru with special emphasis on the Callejones de Huaylas and Conchucos : questions to be considered in an evaluation of CARE-sponsored water, sewage and heal”, vol. no. 1. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. v, 38 p.: fig., 1980.
