Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yoshikawa Kanji,The Subsidy Reduction Policy to Local Air Service Carriers in U. S. A. (2),同志社商学,03872858,同志社大学商学会,1970-12-25,22,3,81-117,https://cir.nii.ac.jp/crid/1390290699887392256,https://doi.org/10.14988/pa.2017.0000006073