G R Chhatwal. (1999). Encyclopaedia of environmental technology,Vol.2. Anmol Publications pvt.Ltd.
Chicago Edition CitationG R Chhatwal. Encyclopaedia of Environmental Technology,Vol.2. New Delhi: Anmol Publications pvt.Ltd, 1999.
MLA Edition CitationG R Chhatwal. Encyclopaedia of Environmental Technology,Vol.2. Anmol Publications pvt.Ltd, 1999.
Warning: These citations may not always be 100% accurate.