Issued also as thesis, Columbia University. / Microfilmed for preservation. DNLM
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/468814121 |
| Date | January 1912 |
| Creators | Simpson, Benjamin Roy, |
| Publisher | New York City : Teachers College, Columbia univ., |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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