Thesis (Ph. D.)--University of Pittsburgh, 1991. / Includes bibliographical references (p. 127-134).
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/647620854 |
| Date | January 1991 |
| Creators | Smith, Villavicencio, Walter J. |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
| Coverage | Mexico |
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