@article{oai:tohoku.repo.nii.ac.jp:00003629,
 author = {蛯名, 正司},
 issue = {2},
 journal = {東北大学大学院教育学研究科研究年報},
 month = {Jun},
 note = {紀要類 (bulletin)},
 pages = {105--119},
 title = {割合の対比的な数量関係の提示が児童の文章題解決に及ぼす影響},
 volume = {58},
 year = {2010}
}