Bibliographic Details
| Main Author: |
Engelhardt, Fred, 1885-1944 |
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| Other Authors: |
Zeigel, William Henry, 1904-,
Proctor, William Martin, 1875-1937,
Mayo, Scovel Summer, 1898- |
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| Format: | Book
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| Language: | English |
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| Published: |
Washington,
U. S. Govt. Print. Off.,
1933.
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| Series: | Bulletin (United States. Office of Education),
1932, no. 17.
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| Subjects: | |
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