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1by Sahrhage, D.Subjects: “...international surveys...”
Published 1984
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2by Sahrhage, D.Subjects: “...international regulations...”
Published 1982
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3
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4by Fischer, W.Subjects: “...international activities...”
Published 1975
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5by Sahrhage, D.Subjects: “...international cooperation...”
Published 1985
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Article in Journal/Newspaper