@article{oai:ir.ide.go.jp:00052762,
 author = {島田, 周平},
 issue = {4},
 journal = {アジア経済},
 month = {Apr},
 note = {PJa/33/Aj11},
 pages = {55--70},
 title = {ナイジェリアのココアベルト形成過程(研究ノート)},
 volume = {18},
 year = {1977}
}