Biblio

R. Shaw, Skinner, B., Ince, M., Pickford, J., Barker, P., Coad, A., y Smith, M., «Water, sanitation, environment and development : proceedings of the 19th WEDC conference, Accra, Ghana, 6-10 September 1993». Water, Engineering and Development Centre, Loughborough University of Technology, WEDC, Loughborough, UK, p. xvii, 322 p. : fig., tab., 1993.

R. Franceys, Barker, P., y Akosa, G., «Appraisal and evaluation : a new approach», in Infrastructure for low-income communities : proceedings of the 16th WEDC conference : Regional Centre for Urban and Environmental Studies (RCUES), Osmania University, Hyderabad, India, 27-31 August, 1990, 1991, pp. P. 127-130: 2 tab.