Das Werdende Weltmuseum der Druckkunst. [A description of the Gutenberg Museum at Mainz, with an appeal for its maintenance /
Gutenberg-Museum Mainz.
Ruppel, Aloys,1882-1977.
Audin, Marius.
Scholderer, Victor.
Sorbelli, Albano.
Bruner Y Prieto, Fernando.
Mainz,
[1930]