Авторитетная формаFerber, Johann принято в: Integrated Authority File (GND), Germany
Источники
Найдено вNDB/ADB-online
Johann Ferber (1430-1501), Mayor of Gdańsk, according to old painting in St. Mary's Church [Pomuchelskopp / Anonymous Painting in St. Mary's Church -- Public domain -- http://commons.wikimedia.org/wiki/File:Johann Ferber.jpg]