References
- Gesell , A. 1925 . Mental Growth of the Preschool Child , New York : Macmillan .
- Krugman , M. 1939 . Some impressions of the revised Stanford-Binet Scale . J. Educ. Psychol. , 30 : 594 – 603 .
- Stutsman , Rachel. 1931 . Mental Measurement of Preschool Children , Yonkers-on-Hudson : World Book .
- Terman , L. M. and Merrill , Maud A. 1937 . Measuring Intelligence , New York : Houghton Mifflin .