John Archibald Wheeler in front of lake in Holstein before the Hermann Weyl-Conference 1985 in Kiel, Germany [credit: Wikimedia Commons user Emielke]
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Image téléchargée par xaagmabag le Mar 19, 2018
Droits d'auteur: From Wikimedia Commons: This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.