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Original source: Antiquariat Dr. Haack Leipzig Author © Foto H.-P.Haack (H.-P.Haack). Das Foto darf für wissenschaftliche oder populärwissenschaftliche Publikationen gebührenfrei verwendet werden, sofern der Urheber mit Foto H.-P.Haack vermerkt wird. Permission (Reusing this file) I, the copyright holder of this work, hereby publish it under the following license: This file is licensed under the Creative Commons Attribution 3.0 Unported license. You are free: to share – to copy, distribute and transmit the work
Author: © Foto H.-P.Haack (H.-P.Haack). Das Foto darf für wissenschaftliche oder populärwissenschaftliche Publikationen gebührenfrei verwendet werden, sofern der Urheber mit Foto H.-P.Haack vermerkt wird. Permission (Reusing this file) I, the copyright holder of this work, hereby publish it under the following license: This file is licensed under the Creative Commons Attribution 3.0 Unported license. You are free: to share – to copy, distribute and transmit the work