Goel, P. K. (1997). Water pollution: Courses, effects and control. New Age International.
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Dyfyniad Arddull Chicago
Goel, P. K. Water Pollution: Courses, Effects and Control. Calcutta: New Age International, 1997.
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Dyfyniad MLA
Goel, P. K. Water Pollution: Courses, Effects and Control. New Age International, 1997.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.