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2programme and meeting document bibliotecaUNESCO
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3book bibliotecaUNESCO
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4book bibliotecaUNESCO
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6by Collective Consultation of Secretaries of National Commissions, Paris, 1971, Hungarian National Commission for UNESCOprogramme and meeting document bibliotecaUNESCO
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9by Research Symposium on Mathematics Education, Budapest, 1962, Hungarian National Commission for UNESCO, Varga, T.programme and meeting document bibliotecaUNESCO
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10by Research Symposium on Mathematics Education, Budapest, 1962, Hungarian National Commission for UNESCO, Varga, T.programme and meeting document bibliotecaUNESCO
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17by Research Symposium on Mathematics Education, Budapest, 1962, Hungarian National Commission for UNESCO, Walusinski, Gilbertprogramme and meeting document bibliotecaUNESCO
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18by Research Symposium on Mathematics Education, Budapest, 1962, Hungarian National Commission for UNESCO, Walusinski, Gilbertprogramme and meeting document bibliotecaUNESCO
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19by Research Symposium on Mathematics Education, Budapest, 1962, Hungarian National Commission for UNESCO, Sangiorgi, Osvaldoprogramme and meeting document bibliotecaUNESCO
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