Tyagi, O. (1996). A Textbook of environmental chemistry. Anmol.
Tohutoru Kātū Chicago (17th ed.)Tyagi, O.D. A Textbook of Environmental Chemistry. New Delhi: Anmol, 1996.
Tohutoro MLA (9th ed.)Tyagi, O.D. A Textbook of Environmental Chemistry. Anmol, 1996.
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