REMOVE

1. Data Visualization
2. Historical
3. Zumbrunn, Armin

WHAT

1. Atlas Map (3)
2. Commerce; Economics (3)
3. Diagram (3)

WHERE

1. Switzerland (3)
2. Europe (1)
3. World (1)

WHO

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

WHEN

1. 1968 (3)
2. 1978 (3)