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Last modified on 26 August 2011, at 08:37
Category:US National Archives Record Group 156: Records of the Office of the Chief of Ordnance, 1797 - 1988
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This category has the following 4 subcategories, out of 4 total.
US National Archives series: Investigation Subject Files, compiled 02/16/1941 - 03/31/1945
US National Archives series: Military Historical Files, compiled 1945 - 1962, documenting the period 1917 - 1962
US National Archives series: Philadelphia Ordnance District: Report, compiled 1946 - 1946
US National Archives series: Photographs, compiled 1942 - 1943
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