Publication for editorial purposes is free of charge with reference Kreklau/Barth. We would be glad to receive a copy. (Mr. Erich Dederichs, dederichs kommunikation GmbH, Prinz-Albert-Str. 81, 53113 Bonn, Germany, email:
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The use of the photos for advertising activities is possible only after previous permission. Please contact: Mr. Erich Dederichs (see above).
