Trivedi, P. R. creator text New Delhi APH Publishing Corporation 1999 monographic 5.v (v 1. vi, 311 ; v 2. 358 ; v 3. 361 ; v 4. 330; v 5. 337) 24cm 5.v ; v.1 Ecology ; v.2 Environment ; v.3 Wild life ; v.4 Pollution ; v.5 Basic environment laws by P. R. Trivedi Environmental sciences -- India Human ecology -- India Wild life 363.7 TRI 8176480401 A-943875 Cen Lib / Ret DPL EN