Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL "Great Britain. D Survey, War Office and Air Ministry",Dizful,Ed. 2-GSGS,"D. Survey, War Office and Air Ministry",1961,"R.A.F. 1:500,000 aeronautical chart : based on U.S.A.F. pilotage chart",,,,https://cir.nii.ac.jp/crid/1130282271353913088