574.52603
S573E
           Swarup, R (Ed.)
               Encyclopaedia of ecology, environment and pollution control environment: an assessment \ R Swarup - New Delhi : Mittal, 1992.
               v.20 (412p)
                ISBN: 81-7099-360-181-7099-380-6 (v.20)

132292
                Subjects: Ecology-Encyclopaedias; Nature and nuture-Encyclopaedias; Pollution control-Encyclopaedias.