Abusive poem against Friedrich Maassen, in Wiener Caricaturen, 24 June 1883
Wiener Caricaturen vom 24. Juni 1883, S. 2 [http://anno.onb.ac.at/cgi-content/anno?aid=wcc&datum=18830624&seite=2]
Abusive poem against Friedrich Maassen, in Wiener Caricaturen, 24 June 1883