Competency-based instruction a strategy to eliminate failure; a branching programmed text
| Váldodahkki: | |
|---|---|
| Eará dahkkit: | |
| Materiálatiipa: | Girji |
| Giella: | eaŋgalasgiella |
| Almmustuhtton: |
Columbus, Ohio
C.E. Merrill Pub.
[1972].
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| Fáttát: |