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| Utgitt
| Lincoln : University of Nebraska Press , [1975]
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| Omfang
| xiv, 214 p., [16] leaves of plates : ill.
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| Opplysninger
| Includes bibliographies.. - Papers presented at the conference held Apr. 30-May 1, 1973 at the University of Nebraska--Lincoln.
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| Emner
| |
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| ISBN
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