The personalized system of instruction : an educational alternative
| Egile nagusia: | |
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| Formatua: | Liburua |
| Argitaratua: |
Washington, D.C. :
Americam Association for Higher Education,
1974
|
| Gaiak: |
| Egile nagusia: | |
|---|---|
| Formatua: | Liburua |
| Argitaratua: |
Washington, D.C. :
Americam Association for Higher Education,
1974
|
| Gaiak: |