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999 _c14512
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020 _a817381404X
082 _a363.7
_bSAN
_223
100 _aSantra, S. C.
245 _aEnvironmental science /
_c[by] S.C.Santra
250 _a2nd ed.
260 _aKolkata
_bNew Central Book Agency
_c2011
300 _axxix, 1244 p.
500 _aIncludes bibliography and index.
509 _aNS
650 _aEnvironmental science
942 _cR