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Experiment in optic rays.
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| Other Authors: | |
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| Format: | Book |
| Language: | English |
| Subjects: | |
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| Item Description: | The film is intended not for pupils, but for teachers to encourage a new approach to their subject. |
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| Physical Description: | Videocassette (VHS)(ca. 30 min.) :sd., B&W. 1/2 in. |