| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:561045 |
| Date | January 1961 |
| Creators | Schumacher, E. G. |
| Contributors | Evans, R. H. |
| Publisher | University of Leeds |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://etheses.whiterose.ac.uk/3199/ |
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