Singh, G., & Inderjeet Kaur Sethi. (1992). Topics and terms in enviornmental science. Commonwealth.
Chicago Stili AlıntıSingh, Gurcharan, ve Inderjeet Kaur Sethi. Topics and Terms in Enviornmental Science. New Delhi: Commonwealth, 1992.
MLA AlıntıSingh, Gurcharan, ve Inderjeet Kaur Sethi. Topics and Terms in Enviornmental Science. Commonwealth, 1992.
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