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![[Letter to "Wilhelm" (William E. Boeing) from Wilhelm Böing]](/img/placeholder.gif?1790288814 "[Letter to "Wilhelm" (William E. Boeing) from Wilhelm Böing]")
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Böing, Wilhelm, 1846-1890, [Letter to "Wilhelm" (William E. Boeing) from Wilhelm Böing], [2018-00-00-154_text_003]. Museum of Flight Digital Collections, accessed 05/10/2026, https://digitalcollections.museumofflight.org/nodes/view/20294