Unesco. Progress of literacy in various countries: A preliminary statistical study of available census data since 1900. Unesco.
Παραπομπή σε μορφή Chicago (17η εκδ.)Unesco. Progress of Literacy in Various Countries: A Preliminary Statistical Study of Available Census Data Since 1900. Unesco.
Παραπομπή σε μορφή MLA (8th εκδ.)Unesco. Progress of Literacy in Various Countries: A Preliminary Statistical Study of Available Census Data Since 1900. Unesco.
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