How to remove pollutants and toxic materials from air and water a practical guide מאת Sittig, Marshall

Pollution and politics in the Philippines מאת Marlay, Ross

Philippine environmental quality 1977 the first annual report of the National מאת Philippine National Environment Protection Council

Control of pollution encyclopaedia

Physical science with environmental and other practical applications מאת Turk, Jonathan

Physical science with environmental and other practical applications מאת Turk, Jonathan

Controlling pollution מאת Muro, Vicente

Environmental management [ejournal].

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Controlling pollution מאת Muro, Vicente

Water pollution technology מאת Black, John A. 1938-