Thesis (PH. D.)--Columbia University, 1928. / Vita. Published also as Teachers College, Columbia University, Contributions to education, no. 284. "Classified bibliography": p. 125-127. Also issued in print.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/301308286 |
| Date | January 1928 |
| Creators | Duvall, Sylvanus Milne, |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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