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Arctic regions
10
Discovery and exploration
Natural history
10
1837-1908
6
1869-1870
6
Deutsche Nordpolar-Expedition
6
Geophysics
6
German
6
Karl
6
Koldewey
6
1869-1870)
4
Geodesy
4
Geology
4
Geomagnetism
4
Germania (Schooner)
4
Greenland
4
Hansa (Schooner)
4
Hydrography
4
Meteorology
4
Scientific Expeditions
4
Shipwreck survival
4
Technical reports
4
1786-1847
2
1807-1873
2
1819-1907
2
18e siècle
2
18th century
2
America
2
English literature
2
Francis Leopold
2
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