@article{oai:teapot.lib.ocha.ac.jp:00017753,
 author = {竹下, 由紀子},
 issue = {6},
 journal = {幼児の教育},
 month = {Jun},
 note = {application/pdf, 一般雑誌記事},
 pages = {56--61},
 title = {集団の成長の過程},
 volume = {68},
 year = {1969}
}