Category:Mathias Koener

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Mathias Koener 
Mathias Koener 1904.jpg
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Date of birth15 November 1883
Date of death7 March 1943
Occupation
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Mathias Koener (lb); Mathias Koener (en); Mathias Koener (es); Mathias Koener (ast) ingenieur (nl)

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