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PERSEE Program, 1992
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PERSEE Program, 1988
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PERSEE Program, 1965
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PERSEE Program, 1959
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PERSEE Program, 1957
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PERSEE Program, 1958
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PERSEE Program, 1955
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PERSEE Program, 1955
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PERSEE Program, 1955
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PERSEE Program, 1955
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PERSEE Program, 1955
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JSTOR, 1987
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JSTOR, 1973
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PERSEE Program, 1955
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PERSEE Program, 1955
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JSTOR, 1976
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JSTOR, 1968
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JSTOR, 1965