00990cam a22002651 4500 e 51000028 DLC 20260227111234.0 820922s1951 dcua 000 0 eng e 51000028 (OCoLC)16764333 DLC OrPS DLC premarc L111 .A6 1951, no. 10 LB1055 .B57 Blackwood, Paul Everett, 1913- How children learn to think. [Washington] Federal Security Agency, Office of Education [1951] iii, 19 p. illus. 23 cm. L111.A6 1951, no. 10 with: How children learn about human rights / Wilhelmina Hill. Washington : Govt. Print. Off., 1951. Bound together subsequent to publication. DLC Thought and thinking. Reasoning. Bulletin (United States. Office of Education) ; 1951, no. 10. United States. Office of Education. Place of subjects series. 22152 22152