WHO -Geneva, CH, World Health Organization,
“Programme for control of diarrhoeal diseases : seventh programme report 1988-1989”. World Health Organization, Diarrhoeal Diseases Control Programme, Geneva, Switzerland, p. ii, 121 p.: fig., tab., 1990.
M. Q. Patton,
Qualitative evaluation and research methods, 2nd ed.nd ed. Newbury Park, CA, USA: SAGE Publications, 1990, p. 532 p.
H. A. Mengers, Sarma, S., and D'Cruz, M.,
“Research on community based public-private partnership in the effective management of urban infrastructure”, vol. no. 5. Human Settlement Management Institute, New Delhi, India, p. 204 p.: fig., tab., 1990.
I. Scoones,
“Researching water resources in Zimbabwe”,
Appropriate technology, pp. p. 28-30 : 2 fig., 1990.
B. S. Nagi,
“Review of ongoing ORT programme in India”. Council for Social Development, New Delhi, India, p. xvii, 221 p. : 40 fig., 93 tab., 1990.
P. Payment and Sanchez, W. A.,
“Water quality control network : proceedings of the meeting held in Ottawa, Canada, 20-24 February 1989”, vol. no. 248e. International Development Research Centre (IDRC), Ottawa, Ont, Canada, p. iv, 28 p.: tab., 1990.