Professional library education introducing the library
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Washington
U. S. Govt. Print. Off.
1938
|
| Cyfres: | Bulletin U. S. Office of Education
no. 23 |
| Pynciau: |