00485nam a2200169Ia 450000500170000000800460001703700120006304000200007504100130009508400210010810000180012924500450014726000470019230000130023949000370025265000260028920250508153031.0008  250505s9999    xx            000 0 eng d  aTextual  aFEDLbengcFEDL  aeng2eng  a371.2, SPEqFEDL  aSpears Harold 0aImproving the supervision of instruction  aNew York, USAbPrentice - Hall, Inc c1955  axii,478p  aPrentice - Hall education series  aSchool Administration