00307nam a2200109Ia 4500020001800000082002100018100002500039245006500064260003300129300000900162650002600171  a9780071009065  a378.170281 BEN/F  aBennett, J. Michael  0aFour Powers of Comunication : Skills For Effective Learning   bMcGRAW-HILLaNew York c1991  a122p  aCommunication Skills