574.52603
S573E
           Swarup, R (Ed.)
               Encyclopaedia of ecology, environment and pollution control environmental water resources: quality demand, pollution \ R Swarup - New Delhi : Mittal, 1992.
               v.12 (v, 277p)
                ISBN: 81-7099-360-181-7099-372-5 (v.12)

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                Subjects: Ecology-Encyclopaedias; Nature and nuture-Encyclopaedias; Pollution control-Encyclopaedias.