1
by Kahlo, Gerhard
Published in Orbis (1970)
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2
4
by Herzog, Rolf
Published in Afrika und Übersee (1965)
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6
by Erkes, Eduard
Published in Sinologica (1953)
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8
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10
by Thorwirth, Paul
Published in Der Kolonialfreund (1928)
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11
12
by Struck, Bernhard
Published in Anthropos (1911)
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13