REMOVE

1. Data Visualization
2. Topography
3. Historical

WHAT

1. Atlas Map (2)
2. Diagram (2)
3. Glaciers (2)
4. Military (1)
5. National Atlas (2)
6. Physical (2)
7. Pictorial map (3)
8. Political (3)
9. Separate Map (3)
10. Statistical (2)

WHERE

1. World (3)
2. Switzerland (2)
3. Valais Alps (Switzerland) (2)
4. Belgium (1)
5. Bernese Alps (Switzerland … (1)

WHO

1. Denoyer-Geppert Company (3)
2. News Map of the Week, Inc … (3)
3. Eidgenössische Landestopo … (2)
4. Imhof, Eduard, 1895-1986 (2)
5. Verlag der Eidgenössisch … (2)

WHEN

1. 1950 (2)
2. 1978 (2)
3. 1949 (1)
4. 1965 (1)
5. 1973 (1)