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Convention for limiting the manufacture and regulating the distribution of narcotic drugs of July 13th, 1931 : historical and technical study by the Opium traffic section of the Secretariat of the League of nations.

Survey of national nutrition policies, 1937/38.

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League of Nations. Secretariat

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Convention for limiting the manufacture and regulating the distribution of narcotic drugs of July 13th, 1931 : historical and technical study by the Opium traffic section of the Secretariat of the League of nations.

Survey of national nutrition policies, 1937/38.