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DE'P05 UG/28954 UG/28955 UG/28956 UG/28957 UG/28958 De, Anil Kumar Environmental studies / Anil Kumar De, Arnab Kumar De. – 2nd rev. ed. – New Delhi ; Kolkata : New Age International, 2005 (2008 reprint) xv [1] 247p. ISBN8122416047 : Rs.80/- . Environmental sciences . De, Arnab Kumar |
