Thesis (PhD)-Open University. BLDSC no.DXN020071.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/617495157 |
| Date | January 1998 |
| Creators | Yang, Suidong. |
| Publisher | n.p., |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
| Source | Full text via Open Research Online repository |
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