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- Language: English
- Year: 2014
- Author: Bryce M. Stewart
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- Year: 2019
- Author: Nina Hager
- Language: German
- Year: 1983
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- Language: German
- Year: 2022
- Author: Steven J. Molinsky
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- Year: 1973
- Author: Catherine Enggas Robert Enggas
- Language: Italian
- Year: 1978
- Author: Inger Rosengren (editor)
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- Year: 1992