Number of Measuring Instruments by Type (FY 1931-1935) : Statistical Yearbook of Imperial Japan 56 (1937) Table 94
度量衡器及計量器 (昭和6年度-昭和10年度) : 大日本帝国統計年鑑 56 (昭和12年) 表94

Central Inspection Institute of Weights and Measures (Japan), Office of the Governor-General of Korea, Office of the Governor-General of Taiwan, Japan. Sakhalin Agency
doi:10.50914/0002001534 fatcat:vq65wh3wlnbq3nrlb3nbrvy4ri