Biblio

J. G. Janssens, Pintelon, L., Cotton, A., y Gelders, L., «Development of a framework for the assessment of operation and maintenance (O&M) performance of urban water supply and sanitation». S.n., S.l., p. 16 p.: 1 fig., 4 tab., 1994.

J. Janssens, Pintelon, L., Cotton, A., y Gelders, L., «Tools for the assessment of operation and maintenance status of water supplies». World Health Organization (WHO), Geneva, Switzerland, p. v, 64 p.: 15 box, 1994.