@article{oai:teapot.lib.ocha.ac.jp:00013590,
 author = {牛山, 佐智恵},
 issue = {7},
 journal = {幼児の教育},
 month = {Jul},
 note = {application/pdf, 一般雑誌記事},
 pages = {50--54},
 title = {ひとりで遊ぶとき、一緒に遊ぶとき},
 volume = {86},
 year = {1987}
}