Just found out something interesting. In a book called "Deutiches Reich Arbeitsbuch" my dad's name is listed as Erich Kampmann, with Kampmann crossed out and changed to Benischek. Does anyone know what the book translated into English would be titled? I now don't know what to do with my family tree should it be Benischek or Kampmann? Any help will be gratefully appreciated. Thanks in advance.