00310nam a2200121Ia 4500008004100000082001400041100002200055245003800077260003800115300001100153942000700164999001700171190709s9999    xx            000 0 und d  a371.1 H6P  aHuggett, Albert J 0aProfessional problems of teachers  aNew YorkbMacmillan Companyc1958  aix,468  cBK  c37775d37775