Medical Services (1928) : Statistical Yearbook of Imperial Japan 49 (1930) Table 259

PERIOD: 1919-1928 year-end. By region, 1928 year-end. SOURCE: Annual Report of the Sanitary Bureau of the Home Department of the Imperial Japanese Government; [Statistics by government offices, overseas territories of Japan].

时期：1919年至1928年年末。按地区划分，1928年年末。资料来源：大日本帝国内务省卫生局年度报告；[由政府机关及日本海外领地统计数据]。