Biblio

Hazen and Sawyer -New York, NY, US, “Process design manual: suspended solids removal”. US Environmental Protection Agency (EPA), Washington, DC, USA, p. xv, 250 p. : fig., tab., 1975.

W. K. Oldham, “Spray irrigation of treated municipal wastewater : papers presented April 9,1975 at Harrison Hot Springs, B.C. and October 30, 1975 at Kelowna, B.C.”, vol. no. EPS 3-PR-76-1. Canada, Environmental Protection Service, Service de la Protection de l'Environnement, Ottawa, Ont, Canada, p. Ca 200 p. : fig., tab., 1975.

“Handbook of trickling filter design”. Public Work Publications, Ridgewood, NJ, USA, p. 26.p. : fig., tab.

M. El-Ashry, Saab, N., and Zeitoon, B., “Water : sustainable management of a scarce resource ”, vol. 3. Arab Forum for Environment and Development, AFED, S.l., p. xxii, 222 p.; refs.; tab.; fig.