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| Utgitt
| Diessenhofen : Rüegger , 1975
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| Omfang
| iv, xviii, 321 p., [1] leaf of plates : ill.
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| Opplysninger
| Bibliography: p. viii-xvii.. - Originally presented as the author's thesis, Hochschule für Wirtschafts- und Sozialwissenschaften, St. Gall, Switzerland.
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| Emner
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