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    Orders and Regulations, Corps of Engineers, U.S. Army, Chapter IV, Fortifications.

    Published 1940
    Full Text (via ProQuest)
    Government Document eBook
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    Fortifications -- estimates for 1837. December 30, 1836. Printed by order of the House of Representatives.

    Published 1836
    Online Access
    Government Document Electronic eBook
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    Annual reports of the War Department for the fiscal year ended June 30, 1902. Report of the Chief of Engineers. Part 1.

    Published 1902
    Online Access
    Government Document Electronic eBook
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