REMOVE

1. Minnesota
2. Wisconsin
3. Petermann, A.
4. Metzeroth

WHAT

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

WHERE

1. Washington (2)
2. Alaska (1)
3. Greenland (1)
4. Idaho (1)
5. Nevada (1)

WHO

1. Justus Perthes (2)
2. Berghaus, Hermann (1)
3. Eberhardt, H. (1)
4. Habenicht, H. (1)
5. Hess, O. (1)

WHEN

1. 1875 (1)
2. 1892 (1)