REMOVE

1. Greenland
2. Washington
3. Justus Perthes
4. Risch, M.

WHAT

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

WHERE

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

WHO

1. Berghaus, Hermann (1)
2. Hess, O. (1)
3. Kogel, F. (1)
4. Risch, M. (1)

WHEN

1. 1892 (1)