Thesis (Ph. D.)--Columbia University, 1914. / Vita. Published also as Contributions to education, Teachers college, Columbia university, no. 65. "Books and articles cited": p. 102-105.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/263031480 |
| Date | January 1914 |
| Creators | Davidson, Percy E. |
| Publisher | New York city, Teachers college, Columbia University, |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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