REMOVE

1. Data Visualization
2. National Atlas
3. Topography
4. Switzerland

WHAT

1. Atlas Map (3)
2. Physical (3)

WHERE

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

WHO

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

WHEN

1. 1978 (3)
2. 1965 (1)
3. 1973 (1)
4. 1975 (1)