| |
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| Utgitt
| Newton Abbot : David and Charles , 1972
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| Omfang
| xix, 250 p. : illus., charts, maps.
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| Opplysninger
| Bibliography: p. 224-231.. - The fourteenth in a series of annual symposia; held at the University College of Wales, Aberystwyth March 17-18, 1971.
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| Emner
| |
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| ISBN
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