Landeskarte der Schweiz 1:50 000 mit Skirouten = Carte nationale de la Suisse avec itinéraire de ski 1:50 000 = Carta nazionale della Svizzera 1:50 000 con itinerario per sciatori.
Wabern-Bern : Eidgenössische Landestopographie,
1963-
Relief shown by contours, shading and spot heights.
Ski routes overprinted in red on standard topographic base maps; information on routes printed on reverse of maps.
Graphic Index in central file.