00430nam a2200145Ia 450000500170000000800460001703700120006304000200007504100130009508400210010824500220012926000600015130000080021149000650021920250508161537.0008  250505s9999    xx            000 0 eng d  aTextual  aFEDLbengcFEDL  aeng2eng  a371.7, METqFEDL 0aHealth and safety  aNew York, USAbMetropolitan School Study Council c1950  a30p  aA series of reports surveying newer educational practices; 6