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020 _a81-7835-211-7
040 _cKL MEHTA
082 _a574.5
100 _aBhargava; Gopal
245 0 _aEnvironmental Challenges And Sustainable Future
260 _c2003
_bKalpana Prakashan
300 _a297
651 _aEnvironmental Studies
942 _cBK
_2ddc