General problems of social insurance / International Labour Office. International Labour Office Social security. Employers' liability insurance. 368.4 ING At head of title: International labour office ... Geneva, 1925. 1925. 1925 Text xxviii, 136 p. : eng Its Studies and reports, Series M (Social insurance) no. 1 International Labour Office. Studies and reports, Series M (Social insurance) no. 1.