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020 _a817099375X
_c550
040 _aMAIN
041 _aEnglish
082 _a577.03
_bSWA
100 _aSwarup, R., Mishra, S.N. and Jauhari, V.P.
245 0 _aEncyclopaedia of ecology , environment and pollution control
_b: environmental water pollution and its control
260 _aNew Delhi
_b; Mittal Publications
_c, 1992
300 _a408p.
_b, V.15
650 _aEcology & Environment-Encyclopaedia
650 _aEncyclopaedia
942 _cBK
999 _c122431
_d122431