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  1. 1
    Physical measurements of existing lock walls /
    by Tracy, R. L
    Published 1942

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    Manuscript Book
  2. 2
    Report on outages of present locks /

    Manuscript Book
  3. 3
    Settlement of lock walls of the Panama Canal /
    by Tracy, R. L
    Published 1941

    Manuscript Book
  4. 4
    Physical measurements in third lock structures /
    by Inman, C. H (Charles H.)
    Published 1942

    Manuscript Book
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