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| Utgitt
| Amsterdam, New York : Elsevier Pub. Co. , 1969
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| Omfang
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| Opplysninger
| An International Symposium held in Einsiedeln on September 29 and 30, 1968 under the auspices of the Swiss Society of the Natural Sciences.. - Includes bibliographies.
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| Emner
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| ISBN
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