Thesis (Ph. D.)--University of Pennsylvania, 1939. / Bibliography: p. 227-242.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/614544218 |
| Date | January 1939 |
| Creators | Irwin, Leonard Bertram, |
| Publisher | Philadelphia, |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
| Coverage | Northwest, Canadian. |
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