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== 外部連結 == |
== 外部連結 == |
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* Friedrich Engels, [ |
* Friedrich Engels, [http://www.ringmar.net/joomla/index.php?option=com_content&view=article&id=814%3Aengels-qof-rifled-cannonq-1860&catid=98%3Awonders-of-technology&Itemid=142 "On Rifled Cannon"], articles from the New York ''Tribune'', April, May and June, 1860, reprinted in ''Military Affairs'' 21, no. 4 (Winter 1957) ed. Morton Borden, 193-198. |
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