REMOVE

1. Data Visualization
2. Historical
3. Kasser, Peter

WHAT

1. Atlas Map (2)
2. Glaciers (2)
3. National Atlas (2)

WHERE

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

WHO

1. Eidgenössische Landestopo … (2)
2. Imhof, Eduard, 1895-1986 (2)
3. Verlag der Eidgenössisch … (2)
4. Gutersohn, Heinrich, 1899 … (1)

WHEN

1. 1978 (2)
2. 1965 (1)
3. 1967 (1)