@article{oai:air.repo.nii.ac.jp:00005225,
 author = {三塚, 正臣},
 issue = {1},
 journal = {東北数学教育学会年報},
 month = {Mar},
 pages = {9--32},
 title = {微分積分学の早期導入の教授理論と実証的研究について},
 year = {1970}
}