"Ryukyus' Largest Industry, Ryukyu Cement Company, Triples Output with Expanded Plant," No. 4, FY 1968 (25 Oct 1967)
(文書名:USCAR Records, The Public Affairs Department = 琉球列島米国民政府広報局文書) (課係名等:The Information Division) (シリーズ名:101-07 Special Posters No. 1 through No. 12 (4 Jul 1965 - 26 May 1969)) (ボックス番号:376 ; フォルダー番号:8)