REMOVE

1. Topography
2. Historical
3. Atlas Map
4. Kasser, Peter

WHAT

1. Data Visualization (1)
2. Glaciers (1)
3. National Atlas (1)

WHERE

1. Bernese Alps (Switzerland … (1)
2. Switzerland (1)
3. Valais Alps (Switzerland) (1)

WHO

1. Eidgenössische Landestopo … (1)
2. Imhof, Eduard, 1895-1986 (1)
3. Röthlisberger, Hans (1)
4. Verlag der Eidgenössisch … (1)

WHEN

1. 1965 (1)
2. 1978 (1)