Expedition name:
Expedition participant(s):
Dümmer, Richard Arnold
Dummer; Dümmer, R.; Dümmer, R.A.; Dümmer, Richard Arnold
1887
1922
1886
1914
Mozambique - 1913; South Africa - 1901-1913. Cape 1907-8; Spain - Canary Islands 1909; Uganda - 1913-19
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