00446nam a2200157Ia 450000500170000000800460001703700120006304000210007504100130009608400190010910000240012824500560015226000460020830000140025470000200026820250508161722.0008  250505s9999    xx            000 0 eng d  aTextual  aFEDL bengcFEDL  aeng2eng  a373, ALEqFEDL  aAlexander William M 0aSecondary education: Basic principles and practices  aNew York, USAbRinehart and Companyc1950  axvi,536p.  a Saylor J Galen