1
2
published 1930
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3
by Thorwirth, Paul
Published in Der Kolonialfreund (1928)
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5
by Luschan, Felix von
published 1927
Book
6
by Eickstedt, Egon von
published 1926
Book
7
by Birket-Smith, Kaj
published 1925
Book
8
by Heine-Geldern, Robert
published 1921
Book
9
by Mieses, Matthias
published 1919
Book
10
11
by Torres, Luis Maria
published 1911
Book
12
by Koch-Grünberg, Theodor
published 1910
Book
13
by Matthan, John Mathew
published 1910
Book
14
by Starr, Frederick
published 1909
Book
15
Book
16
by Luschan, Felix von
published 1907
Book
17
by Hübner, Georg
published 1907
Book
18
by Girard, Henry
published 1904
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