Biblio

M. Osola, «A few buckets more : reducing sand invasion and siltation in Angola», Waterlines, an international journal of water, sanitation and waste, pp. p. 28-29 : 2 boxes, 2 fig., 1 photgr., 1998.

M. R. Collins, Cole, J. O., Westersund, C. M., y Paris, D. B., «Assessing roughing filtration design variables», Water supply : the review journal of the International Water Supply Association, pp. p. SS 5.29 - 5.40: 9 fig., 11 tab., 1994.

M. Wegelin, «Roughing gravel filters for suspended solids removal», in Slow sand filtration : recent developments in water treatment technology, 1988, pp. P. 103-122: fig., tab.

L. Di Bernardo, «Upflow coarse-grained prefilter for slow sand filtration», in Slow sand filtration : recent developments in water treatment technology, 1988, pp. P. 123-140: fig., tab.

L. K. U. N. I. C. E. F. - Colombo, «Iron removal plant : installation and maintenance manual». UNICEF Water, Environment and Sanitation Section, Colombo, Sri Lanka, p. 11 p.: tech. drwng, photogr., 1987.

K. Bucksteeg, «Sewage treatment in helophyte beds : first experiences with a new treatment procedure», Water science and technology, pp. p. 1-10 : 7 fig., 1987.

J. N. Kardile, Simple methods in water purification. Nasik, India: Foundation for Simplified Filters, 1987, p. 179 p.: fig., tab.

K. V. Ellis, «Slow sand filtration as a technique for the tertiary treatment of municipal sewages», Water research, pp. p. 403-410: tab., 1987.

L. Childers y Claasen, F., «UNICEF's upward-flow water filter», Waterlines, an international journal of water, sanitation and waste, pp. p. 29-31: ill., 1987.

K. E. U. N. I. C. E. F. Reg Nairobi, «The upward flow water filter». UNICEF Regional Office for Eastern and Southern Africa, Nairobi, Kenya, p. [5] p.: ill., 1987.

B. J. Lloyd, Wheeler, D., y Pardon, M., «Final report on the development, evaluation and field trials of a small scale, multi-stage, modular filtration system for the treatment of rural water supplies». DelAgua, Lima, Peru, p. 42, 107 p. : fig., tab., 1986.

B. J. Lloyd, Wheeler, D., Pardon, M., y Symonds, C. N., «Aspects of prefiltration concerned with the application of small scale slow sand filtration in rural communities». University of Surrey, Department of Microbiology, Guildford, UK, p. 112 p.: fig., tab., photogr., 1985.

B. J. Lloyd, Wheeler, D., Pardon, M., y Symonds, C. N., «Progress report (phase II) for the attention of UK Overseas Development Administration : rural water treatment package plant». Overseas Development Administration (ODA), London, UK, p. 134 p.: fig., 1983.

N. M. Merchant, «Construction of an intermittent water filter for villages in Southern Iran», Journal of Indian Water Works Association, pp. p. 177-179 : fig., tab., 1976.