Biblio

J. Pickford, «The design of septic tanks and aqua-privies», vol. no. 187. Building Research Establishment, Overseas Division, Watford, UK, p. 12 p., 1980.

J. Pickford, «Water, waste and health in hot countries : second international conference on environmental health and engineering in hot climates & developing countries». Loughborough University of Technology, Department of Civil Engineering, Loughborough, UK, p. 146 pp. : fig. tab. ref., 1975.