| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/287940 |
| Date | January 1972 |
| Creators | Petring, Ekkehard Jurgen, 1939- |
| Publisher | The University of Arizona. |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | German |
| Type | text, Dissertation-Reproduction (electronic) |
| Rights | Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. |
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