Heim, A. and Schmidt, C. (eds), (1927). Geologische Karte der Schweiz [Geological Map of Switzerland]. Zurich: Schweizerische Geologische Kommission.1:500,000
Heim, A. and Schmidt, C. (eds), (1927). Geologische Karte der Schweiz [Geological Map of Switzerland]. Zurich: Schweizerische Geologische Kommission.1:500,000 scale. Reprint of 2nd edition. Colour lithograph, 55.5 x 75cm, dissected and mounted on linen folding to 19.5 x 12.5 cm. Title block missing, replaced by card with library stamps. Linen-taped edges, internal panel edges worn particularly at fold intersections, old tape removal with partial loss to key. Key in French and German. In poor to fair condition.