Madlena Cavelti Hammer:
The federal national heroes on old maps. 1291–1991, 700 years of the Swiss Confederation
Cartographica Helvetica 4 (1991) 31–34
The author shows, and discusses, the iconography of Wilhelm Tell and the Helvetia on maps from 1641 (by David Hautt) to 1939 (by Otto M. Müller and Eduard Imhof).