Thesis (Ph. D.)--Johns Hopkins University, 1928. / Published also as Genetic psychology monographs, vol. 7, no. 1. Vita. Bibliography: p. 77.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/557791046 |
| Date | January 1930 |
| Creators | Duffy, Elizabeth, |
| Publisher | Baltimore, |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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