@article{oai:tohoku.repo.nii.ac.jp:00001782,
 author = {SATO, FUMIKO},
 journal = {Tohoku psychologica folia},
 month = {Mar},
 note = {紀要類(bulletin)},
 pages = {89--104},
 title = {A Longitudinal Study on Development of Kindergarten Children (I) : Operational Structural Development and Socialization},
 volume = {39},
 year = {1981}
}