https://www.esmh.de/web/de/esmh/index.html
Emil Schumacher Museum Hagen
https://www.davidrumsey.com/amica/amico202124-15519.html
Emil Schumacher / Untitled, from the portfolio ATISCHA / 1959
Emil Schumacher / Untitled, from the portfolio ATISCHA / 1959