Diwan, A. P. Ecology of environmental cycles A P. Diwan and D. K. Arora - New Delhi Anmol Publications 1991 - [4],400p.: ill.; 22cm.- - Recent advances in environmental ecology series ;no.11 . ISBN: 8174881204 Subjects--Topical Terms: EcologyEnvironmental BiologyEnvironmental Geography Dewey Class. No.: 333.7 / DIW