00349nam a2200133 a 450000500170000002000150001708200190003210000180005124500330006926000510010230000240015370000220017770000160019920251203091919.0  a8170247403  a363.7,bD, Aga  aAgarwal, S.K.  aBiodiversity and environment  aNew DelhibA.P.H. Publishing corporationc1996  axviii,351p.c23 cm.  aTiwari, Swarnlata  aDubey, P.S.