REMOVE

1. Arctic
2. Stieler, Adolf
3. G. Schmidt

WHAT

1. Atlas Map (2)
2. World Atlas (2)

WHERE

1. North Pole (1)
2. Northern Hemisphere (1)

WHO

1. Berghaus (2)
2. Haack, H. (2)
3. Justus Perthes (2)
4. Reichenbecher (2)

WHEN

1. 1925 (1)
2. 1939 (1)
3. 1945 (1)