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
International Civil Aviation Organization,Statistical appraisal of non-scheduled commercial operations with large aircraft for the year 1968,,International Civil Aviation Organization,1971,ICAO circular,,,,https://cir.nii.ac.jp/crid/1130000796939738112