J. P. Chudy, Arniella, E., and Gil, E.,
“Water quality assessment in Ecuador”, vol. no. 390. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. xiv, 71 p.: 11 fig., 1 map, 2 tab., 1993.
D. Cullivan, Burns, K., and J. Dingman, S.,
“Water shortage and related public health problems : an action plan for the city of Beira, Mozambique”, vol. no. 389. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. xiii, 72 p.: 9 fig., 2 tab., 1993.
C. Allsebrook,
“Water wisdom”. Guthrie Allsebrook & Co, Oxford, UK, p. 200 p.: fig., photogr., 1993.
H. Morange and Mashauri, D. A.,
“Workshop on management of urban water services, Tampere 25.4.1991”, vol. no. 48. Tampere University of Technology, Institute of Water and Environmental Engineeri, Tampere, Finland, p. 115 p.: fig., tab., 1993.