REMOVE

1. Physical
2. World
3. Washington
4. Risch, M.

WHAT

1. Atlas Map (1)
2. Geologic Atlas (1)
3. Geology (1)

WHERE

1. Alaska (1)
2. Greenland (1)
3. Switzerland (1)

WHO

1. Berghaus, Hermann (1)
2. Hess, O. (1)
3. Justus Perthes (1)
4. Kogel, F. (1)

WHEN

1. 1892 (1)