Items

Items

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  [E1579BM], Letter from Richard Lewis Humphrey, American Concrete Institute to Stephen Babcock Mambert, February 6th, 1915

  1915-02-06
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  [E1579BM1], Letter from Richard Lewis Humphrey, American Concrete Institute to Walter Seeley Mallory, February 6th, 1915

  1915-02-06
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  [X511A], Report from Cass Gilbert, American Concrete Institute, Richard Lewis Humphrey, Egbert Jessup Moore, William H Ham, August 1915

  1915-08-00
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  [X511E], Report from Emile George Perrot, Edward Dayton Boyer, Arthur Newell Talbot, Nathan Clarke Johnson, Richard Lewis Humphrey, Theodore Lincoln Condron, August 1915

  1915-08-00