APA aipamena

Rao,Venugopala P. (2012). Textbook of environmental engineering. PHI Learning.

Chicago Style aipamena

Rao,Venugopala P. Textbook of Environmental Engineering. New Delhi: PHI Learning, 2012.

MLA aipamena

Rao,Venugopala P. Textbook of Environmental Engineering. PHI Learning, 2012.

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