Children's sleep; a series of studies on the influence of motion pictures; normal age, sex, and seasonal variations in motility; experimental insomnia; the effects of coffee; and the visual flicker limens of children
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| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
New York,
The Macmillan Company,
1933.
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| Series: | Motion pictures and youth
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| Subjects: |