00493nam a2200169Ia 450000500170000000800460001703700120006304000210007504100130009608400210010910000160013024500460014626000560019230000130024849000360026165000260029720250508152050.0008  250505s9999    xx            000 0 eng d  aTextual  aFEDL bengcFEDL  aeng2eng  a371.2, AYEqFEDL  aAyer Fred C 0aFundamentals of instructional supervision  aNew York, USAbHarper and Brothers Publishersc1954  axvi,523p  aExploration series in education  aSchool Administration