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

Pollution and politics in the Philippines by Marlay, Ross

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

Control of pollution encyclopaedia

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

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

Controlling pollution by Muro, Vicente

Environmental management [ejournal].

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Controlling pollution by Muro, Vicente

Water pollution technology by Black, John A. 1938-