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Data archives for the social sciences : purposes, operations and problems / David Nasatir.
- UNESCO,
- 1973.
- Paris :
-
A Selection from the Overall Findings of the I.E.A Study in Science, Reading Comprehension, Literature, French as a Forgein Language, English as a Foreign Language and Civic Education / T.Neville Postlethwaite.
- 371.2'6
- Postlethwaite, T. Neville.
- UNESCO,
- 1973.
- Paris :