ISSN 0439-755X
CN 11-1911/B
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A STUDY ON THE DEVELOPMENT OF NUMBER CONCEPTS AND OPERATIONAL ABILITIES OF 7—12 YEARS OLD IN 10 DISTRICTS IN CHINA
Liu Fan,Lu Jing,Shen Jia-xian,Lai Chang-gui,Zhang Zeng-jie,Liu Jing-xian,Ding Song-nian,Xu Xiu-chang,Cao Zi-fang and Wang Peng-fei
Acta Psychologica Sinica . 1981, (
02
): 21 -35 .
