U.S. Dept. of Health, Education, and Welfare, Office of Education; [for sale by the Superintendent of Documents, U.S. Govt. Print. Off.1966]<371.9665-Un27s>
Jane Stallings ; with commentary by Millie Almy, Lauren B. Resnick and Gaea LeinhardtThe University of Chicago Press for the Society for Research in Child Development1975