著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
,"Radio aids to navigation : including details of direction-finder stations, radiobeacons, navigational warnings, time signals, etc.",,United States Government Printing Office,1937,Hydrographic office,,,,https://cir.nii.ac.jp/crid/1130282268990681088