Deismireacht APA

Duggal, K. (1996). Elements of environmental engineering (6th ed.). S.Chand & Co.

Chicago Edition Citation

Duggal, K.N. Elements of Environmental Engineering. 6th ed. New Delhi: S.Chand & Co, 1996.

Deismireacht MLA

Duggal, K.N. Elements of Environmental Engineering. 6th ed. S.Chand & Co, 1996.

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