@article{oai:juen.repo.nii.ac.jp:00004880,
 author = {布川,  和彦 and Nunokawa,  Kazuhiko},
 issue = {21},
 journal = {上越数学教育研究, Joetsu journal of mathematics education},
 month = {Mar},
 pages = {1--12},
 title = {比例的推論の授業における小学校４年生の学習の様相},
 year = {2006},
 yomi = {ヌノカワ, カズヒコ}
}