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XXIInd International conference on public education [held in Geneva, 6-15 July, 1959] / UNESCO. International bureau of education.
- International bureau of education [etc.],
- 1959.
- Geneva [etc.] :
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Primary school textbooks : preparation, selection, use : a comparative study / UNESCO. International bureau of education.
- International bureau of education [etc.],
- 1959.
- Geneva [etc.] :