LC Civil War maps (2nd ed.), S192a Relief shown pictorially and by form lines, hachures, and spot heights. "Section XVII, 5a. Blatt 383." Available also through the Library of Congress Web site as a raster image. Includes index to adjacent sheets. Prime meridian: Paris? From Topographischer Atlas der Schweiz im Massstab der Original-Aufnahme, also called the Siegfried-Atlas. Sheets were issued beginning in 1870. LC...
Switzerland. Eidg. Landestopographie - Müllhaupt, F.