Chhatwal, G. R. A. (1997). Encyclopaedia of environmental waste pollution.
Chicago Style aipamenaChhatwal, G R; Author. Encyclopaedia of Environmental Waste Pollution. New Delhi, Anmol publications Pvt.Lmd, 1997.
MLA aipamenaChhatwal, G R; Author. Encyclopaedia of Environmental Waste Pollution. 1997.
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