Improving the learning environment a study on the local preparation of visual instruction materials
| Hlavní autor: | |
|---|---|
| Médium: | Kniha |
| Jazyk: | English |
| Vydáno: |
[Washington]
U.S. Dept. of Health, Education, and Welfare, Office of Education
[1963].
|
| Edice: | U.S. Office of Education. Circular no. 718
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