(1980). Literacy 1972-1976: Progress achieved in literacy throughout the world (ed.). UNESCO.
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Chicago-čujuhus (17. p.)
Literacy 1972-1976: Progress Achieved in Literacy Throughout the World. ed. Paris: UNESCO, 1980.
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MLA-čujuhus (9. p.)
Literacy 1972-1976: Progress Achieved in Literacy Throughout the World. ed. UNESCO, 1980.
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