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- [2] German Imperial Insurance Agency and the international Conferences on Labor Insurances ARCHIV FUR SOZIALWISSENSCHAFT UND SOZIALPOLITIK, 1909, 28 (02): : 584 - 584
- [6] Existing Institutions of Insurance against Unemployment Abroad and in the German Empire ARCHIV FUR SOZIALWISSENSCHAFT UND SOZIALPOLITIK, 1907, 25 (01): : 271 - 281
- [7] Insurance against Unemployment ARCHIV FUR SOZIALWISSENSCHAFT UND SOZIALPOLITIK, 1909, 29 (03): : 999 - 999