@article{oai:teapot.lib.ocha.ac.jp:00027933,
 author = {岩下, 吉衞},
 issue = {5},
 journal = {幼兒の教育},
 month = {Jul},
 note = {application/pdf, 一般雑誌記事},
 pages = {17--29},
 title = {初學年兒童の數觀念調査},
 volume = {25},
 year = {1925}
}