By White, Sheldon Harold.
México Harper & Row Latinoamericana 1980 .
128 p. , Translation of : Childhood: pathways of discovery. | Includes index.

Washington [Dept. of Health, Education, and Welfare]; for sale by the Supt. of Docs., U.S. Govt. Print. Off. 1973 .
v. , "Contract no. HEW-OS-71-170."