Thesis (PhD)-Open University. BLDSC no.DX96698.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/617479154 |
| Date | January 1991 |
| Creators | Gray, Norman. |
| Publisher | n.p., |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
| Source | Full text via Open Research Online |
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