THE DEVELOPMENT OF CONCEPTION OF NUMBER IN CHILDREN 3-7 YEARS OLD IN NINE DISTRICTS THROUGHOUT CHINA AND THEIR ABILITY TO PERFORM ARITEMETRCAL OPERATIONS:A GENERAL REPORT
The Cooperative Research Group of Child's Conception of Numbers
The Cooperative Research Group of Child's Conception of Numbers. (1979). THE DEVELOPMENT OF CONCEPTION OF NUMBER IN CHILDREN 3-7 YEARS OLD IN NINE DISTRICTS THROUGHOUT CHINA AND THEIR ABILITY TO PERFORM ARITEMETRCAL OPERATIONS:A GENERAL REPORT. , 11(1), 111-120.