Topic
Arctic regions
Scientific Expeditions
36
Natural history
30
Greenland
18
Iceland
17
Hydrography
16
Geophysics
14
Discovery and exploration
13
Ingolf (Ship)
12
Marine biology
12
Diptera
11
Description and travel
10
Paleobotany
10
Norway
9
Zoology
8
1869-1870
7
Deutsche Nordpolar-Expedition
7
Koldewey
7
1837-1908
6
Birds
6
Fram (Ship)
6
German
6
Karl
6
Observations
6
Spitsbergen
6
Canadian
5
Fishes
5
Jellyfishes
5
Northwest
5
1869-1870)
4
Bryozoa
4
Geodesy
4
Geology
4
Geomagnetism
4
Germania (Schooner)
4
Germany
4
Hansa (Schooner)
4
Hudson Bay
4
Meteorology
4
Northwest Passage
4
Shipwreck survival
4
Technical reports
4
Voyages and travels
4
Antarctica
3
North Pole
3
Northeast Passage
3
Novai͡a Zemli͡a (Russia)
3
Svalbard (Norway)
3
Vega (Ship)
3
Whaling
3
more ...