00272    a2200109   450000500170000002000180001708400200003510000180005524500340007326000450010730000100015220260707161640.0  a9789355244826  2CCa G9557:5     aSOMESH JAIDEV  a Manual of Freshwater Ecology  bOxford book company,  c2025,aNew Delhi  a303p.