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Oldenburg: Lappan, 1993
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Hamburg: Oetinger, 1988
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Zürich: Diogenes-Verlag, 1978
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Oldenburg, 1999
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Oldenburg: Lappan, 1990
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Zürich: Diogenes, 1982
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Zürich: Diogenes Verl., 1984
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Zürich: Diogenes-Verlag, 1987
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Tarrytown, NY: Marshall Cavendish Children, 2012
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Zürich: Diogenes-Verl., 1985
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Ovid Technologies (Wolters Kluwer Health), 2013