Japanese Economic Statistics (Apr 1956) Bulletin No. 116, Section II: Foreign and Domestic Commerce (Economic Planning Board, Japanese Government)
(文書名:USCAR Records, The Comptroller Department = 琉球列島米国民政府計画局文書) (シリーズ名:201-07 Reference Publication Files of Japanese Economic Statistics, 1949-1958) (ボックス番号:122 ; フォルダ番号:11)