| |
|---|
| Utgitt
| [Washington] : Office of Education, Office of Program Planning and Evaluation; [for sale by the Supt. of Docs., U.S. Govt. Print. Off. , 1972, i.e. 1973]
|
|---|
| Omfang
| |
|---|
| Opplysninger
| Bibliography: p. 114-115.. - Previously issued in 1969 by the U.S. Office of Education as a working paper.
|
|---|
| Emner
| |
|---|
