@article{oai:ritsumei.repo.nii.ac.jp:00004768,
 author = {横山, 研治},
 issue = {3},
 journal = {政策科学, 政策科学},
 month = {Mar},
 pages = {135--150},
 title = {航空運送状と貿易決済},
 volume = {14},
 year = {2007}
}