(1929) Swiss graphic designer and artist involved in the Concrete Movement who studied at the Schule für Gestaltung Zürich, founded the Janus Press, then taught for several years at the Schule für Gestaltung Zürich.
- Hollis, Richard. Swiss Graphic Design: the Origins and Growth of an International Style, 1920–1965. New Haven: Yale UP, 2006, p. 256
- Friedl, Friedrich, Nicolaus Ott, and Bernard Stein. Typography: an Encyclopedic Survey of Type Design and Techniques throughout History. New York: Black Dog & Leventhal, 1998, pp. 138–139