Report of Result for the Test of Experimental Police Radio Service (文書名:GHQ/SCAP Records, Civil Communication Section = 連合国最高司令官総司令部民間通信局文書) (シリーズ名:Subject File, 1945-51) (ボックス番号:3205 ; フォルダ番号:10)
Report of Result for the Test of Experimental Police Radio Service