@article{oai:seijo.repo.nii.ac.jp:00002931,
 author = {齋藤, 正},
 issue = {26},
 journal = {成城大學經濟研究},
 month = {Mar},
 note = {P(論文)},
 pages = {95--116},
 title = {外部経濟論(一)},
 year = {1968}
}