Thesis (Ph. D.)--Columbia University, 1920. / Vita. Published also as Teachers College, Columbia University. Contributions to education, no. 112.
Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/576096952 |
Date | January 1921 |
Creators | Voelker, Paul Frederick, |
Publisher | New York City, Teachers College, Columbia University, |
Source Sets | OCLC |
Language | English |
Detected Language | English |
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