Swarup, R. . Encyclopaedia of ecology, environment and pollution control / by R. Swarup, S.N. Mishra and V.P. Jauhari. - New Delhi : Mittal Publications , 1992 - 15 vols ; ISBN: 81-7099-360-1 Subjects--Topical Terms: Environment Dewey Class. No.: G:5 / P2.5