Self-Concepts of Children with Mental Retardation : The Relation of Perceived Competence and Social Acceptance to Chronological Age and Mental Age 論文 Hirotoshi OTANI・Iwao Ogawa ·1996-01-01 ·『The Japanese Journal of Special Education』 34(2) pp. 11-19 doi:10.6033/tokkyou.34.11_1