00382nam a2200145 a 450000500170000008200150001710000180003210000150005010000170006524500590008226000310014130000230017249000290019563000120022420251203091011.0  a574.5bTRI  aTrivedy, R.K.  aGoel, P.K.  aTrisal, C.L.  aPractical methods in ecology and environmental science  aKaradbEnvironmentalc1987  a340 p.b22 cm.cHB  aSeries in methodologyd2  aEcology