| |
|---|
| Utgitt
| Washington : For sale by the Supt. of Docs., U.S. Govt. Print. Off , 1971
|
|---|
| Omfang
| |
|---|
| Opplysninger
| "A cooperative report of the Division of Research and Evaluation, Children's Bureau, Office of Child Development, and the Social Research Group, George Washington University.". - Includes bibliographical references.
|
|---|
| Emner
| |
|---|
