00271    a2200109   4500020001500000082001600015100001800031245002800049260005100077300002100128650001200149  a817024482X  a577.01bAGA  aAgarwal, S.K.  aFundamentals of ecology  aNew DelhibAshish Publishing Housec1992g1992  axvii,442p.c23cm  aEcology