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Jan Frederik van Beeck Calkoen. Jan Frederik van Beeck Calkoen Jodocus Heringa Ter gedachtenisse van wijlen Jan Frederik van Beek Calkoen author PDold Original upload log de Ireas CommonsHelper page de JanFrederikvanBeeckCalkoen Fulmen bytes no Information Jan Frederik van Beeck Calkoen Jodocus Heringa Ter gedachtenisse