00477nam a2200157Ia 450000500170000000800460001703700290006304000210009204100130011308400210012610000200014724500320016724500520019926000600025130000080031120250508153422.0008  250505s9999    xx            000 0 eng d  aBooks to be hide in OPAC  aFEDL bengcFEDL  aeng2eng  a371, UNI/OqFEDL  aWhitelaw John B 0aTeaching opportunities 1959 0cU S Department of Health, Education and Welfare  aWashington, USAbU.S. Government Printing Office c1960  a39p