00250nam a2200109 a 450000500170000008200170001710000220003424500330005625000110008926000250010030000150012520251203090544.0  a334,bD, kri  aKrishnaswami O.R.  aFundamentals of co-operation  a2nd ed  aDelhibS.Chandc1985  a196p, 22cm