"Linoleum" Image Credits

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https://commons.wikimedia.org/wiki/File:Krupp_gun_-_Paris_1867.jpg
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https://en.wikipedia.org/wiki/File:U-Boote_Kiel_1914.jpg
https://commons.wikimedia.org/wiki/File:Bundesarchiv_Bild_119-1486,_Hitler-Putsch,_M%C3%BCnchen,_Marienplatz.jpg
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