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1Published 1985“...Bulletin of the International Bureau of Education (1985)...”
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2
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3Published 1979Subjects: “...International Bureau of Education....”
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5Published 1971“...Bulletin of the International Bureau of Education (1985)...”
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7
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9
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10
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11
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13
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18
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20Published 1954“...Publication (International Bureau of Education) ;...”
Conference Proceeding Book