| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:557506 |
| Date | January 2012 |
| Creators | Lei, Jie |
| Contributors | Walker, Alan |
| Publisher | University of Sheffield |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://etheses.whiterose.ac.uk/2201/ |
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