Topographische Karte der Schweiz (Dufourkarte).
Switzerland.Eidg. Landestopographie.
Dufour, Guillaume Henri,1787-1875.
[Bern : Eidg. Landestopographie],
1908-1936.
Relief shown by hachures and spot heights.
"C.H. Dufour direxit."
Title on sheet 1. Sheet 5 has legend, list of place names in German, French, Italian and Romansh). Index on sheet 21. List of highest peaks on sheet 25.
Reprints of ed. publ. 1842-1887.
III (1934) -- IV (1931) -- X (1935) -- XXI (1909)