A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL.
The file type is application/pdf.
三浦 香苗, 西谷 さやか. "310 幼児の数概念についてIV : 和や差の3用法における困難度の分析 その2(発達13,口頭発表)." Annual Convention of the Japanese Association of Educational Psychology 19.0 (1977) 288-289