Programmed learning aid for person perception
| Prif Awduron: | , |
|---|---|
| Awduron Eraill: | |
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Homewod, Illinois
Learning Systems Company
©1975.
|
| Cyfres: | Irwin programmed learning aid series
no. 9 |
| Pynciau: |