The personalized system of instruction : an educational alternative
| Váldodahkki: | |
|---|---|
| Materiálatiipa: | Girji |
| Almmustuhtton: |
Washington, D.C. :
Americam Association for Higher Education,
1974
|
| Fáttát: |
| Váldodahkki: | |
|---|---|
| Materiálatiipa: | Girji |
| Almmustuhtton: |
Washington, D.C. :
Americam Association for Higher Education,
1974
|
| Fáttát: |