School use of visual aids : an interpretative study of the data collected in the national survey of visual instruction in elementary and secondary schools.
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| Format: | Government Document eBook |
| Language: | English |
| Published: |
[Washington] :
[s.n.],
1938.
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| Online Access: | Electronic resource (PDF) |
| Item Description: | Includes illustrations and tables. |
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| Physical Description: | 1 online resource (77 pages), digital, PDF file |