00332nam a22001217a 4500020001500000082001900015100002100034245006300055260003800118300001000156650001500166650002900181  a0073405000  a658.322bCER/S  a Certo, Samuel C  aSupervision : concepts and skill-building/cSamuel C Certo  aBostonb McGraw-Hill/Irwinc2008.  a573 p  aManagement  aSupervision of employees