1990
N. L. I. L. A. C. O. - Arnhem, YE, Y. Ministry o, en DGIS, D. General fo,
“Monitoring of hydrological and meteorological characteristics in Al Bayda province 1988”. Ilaco, Arnhem, The Netherlands, p. ii, 185 p. : 11 fig., 1990.
J. Ramakrishna, Sridhar, M. K. C., Adeniyi, J. D., en Brieger, W. R.,
“Monitoring use of monofilament nylon water filters for Guineaworm control in a rural Nigerian community”,
International quarterly of community health education, pp. p. 5-18: tab., 1990.
I. N. U. N. I. C. E. F. - Ne Delhi, Delhi, I. N. Centre for, en IN, I. Rajiv Gand,
“National colloquium on role of women in water resource management : report : 16-18 August, India International Centre, New Delhi, India”. Centre for Women's Development Studies, New Delhi, India, p. 71 p., 1990.
S. Akhtar,
“National information and informatics policies in Africa : report and proceedings of a regional seminar, Addis Ababa, Ethiopia, 28 November - 1 December 1988”. International Development Research Centre (IDRC), Ottawa, Ont, Canada, p. vii, 298 p.: fig., tab., 1990.
G. K. Folkard, Sutherland, J. P., en Grant, W. D.,
“Natural coagulants for appropriate water treatment : a novel approach”,
Waterlines, an international journal of water, sanitation and waste, pp. p. 30-32: fig., photogr., 1990.
G. K. Folkard, Sutherland, J. P., en Grant, W. D.,
“Natural coagulants for small scale water treatment : potential applications”,
ASEP newsletter, pp. p. 1-2, 10, 14: fig., tab., 1990.
S. C. Reed,
Natural systems for wastewater treatment, vol. FD-16. Alexandria, VA, USA: Water Pollution Control Federation, 1990, p. v, 270 p.: fig., tab.
S. Price,
“New initiatives in water supply and sanitation : project success and sustainability”, vol. no.1. AusAID Australian Agency for International Development, Canberra, ACT, Australia, p. 24 p., 1990.
D. B. Warner,
“New roles for monitoring and evaluation in water supply and sanitation”. World Health Organization, Community Water Supply & Sanitation Unit, Geneva, Switzerland, p. 9 p.: fig., 1990.
“no. 165”,
Water resources journal. 1990.
“no. 166”,
Water resources journal. 1990.
“no. 47 (1990)”,
Echos du COTA. 1990.
“no. 48 (1990)”,
Echos du COTA. 1990.
“no. 79”,
Bulletin de liaison du Comite Interafricain d'Etudes Hydrauliques. 1990.
“no. 81”,
Bulletin de liaison du Comite Interafricain d'Etudes Hydrauliques. 1990.
“no. 82”,
Bulletin de liaison du Comite Interafricain d'Etudes Hydrauliques. 1990.
R. Fothergill en Butchart, I.,
Non-book materials in libraries : a practical guide, 3rd ed.e ed. London, UK: Library Association Publishing, 1990, p. vi, 319 p.: 30 fig.