Pittsburgh, Pa. Report upon improvement of rivers and harbors in Pittsburgh, Pa., district, Francis R. Shunk in charge; app. EE, annual report of chief of engineers, 1913.
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Pittsburgh, Pa. Report upon improvement of rivers and harbors in Pittsburgh, Pa., district, Francis R. Shunk in charge; app. EE, annual report of chief of engineers, 1913.
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Pittsburgh, Pa. Report upon improvement of rivers and harbors in Pittsburgh, Pa., district, Francis R. Shunk in charge; app. EE, annual report of chief of engineers, 1913.