Não informado. (1955). International Review of Education. Unesco, Institute for Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. International Review of Education. Hamburg, Alemanha: Unesco, Institute for Education, 1955.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. International Review of Education. Unesco, Institute for Education, 1955.
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