000 00320nam a2200121Ia 4500
008 120224s9999 xx 000 0 und d
082 _a370.7
_bUNE
100 _aUnesco
245 _aEducational studies and documents
260 _bThe Author
_aParis
_c1973
650 _aEducation
650 _aEducation--Documents
999 _c140746
_d140746