@article{oai:kansai-u.repo.nii.ac.jp:00007313,
 author = {春日, 淳一},
 issue = {1},
 journal = {關西大學經済論集},
 month = {Jul},
 pages = {1--18},
 title = {N.ルーマンのメディア論について},
 volume = {31},
 year = {1981}
}