Issued also as thesis (PH. D.) Columbia university. / Bibliography: p. 101-105.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/625615923 |
| Date | January 1937 |
| Creators | Wilkins, Eugene G. |
| Publisher | New York city, Teachers College, Columbia university, |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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