REMOVE

1. Atlas Map
2. Geology
3. Central America
4. Panama

WHAT

1. Data Visualization (1)
2. Mountains; Rivers (1)
3. Physical (1)

WHERE

1. Canada (1)
2. Hawaii (1)
3. Mexico (1)

WHO

1. Berghaus, Heinrich (2)
2. Justus Perthes (2)
3. Berghaus, Hermann (1)
4. Risch, M. (1)

WHEN

1. 1840 (1)
2. 1849 (1)
3. 1887 (1)
4. 1892 (1)