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    New 152-lb. Flat-bottomed rails, Pennsylvania railroad

    Skillman, T.J. | Engineering Index Backfile | 1931
    Keywords: Rails

      New 152-lb. Flat-bottomed rails, Pennsylvania railroad

      Skillman, T.J. | Engineering Index Backfile | 1931
      Keywords: Rails

      New 152-lb. Flat-bottomed rails, Pennsylvania railroad

      Skillman, T.J. | Engineering Index Backfile | 1931
      Keywords: Rails

      New 152-lb. Flat-bottomed rails, Pennsylvania railroad

      Skillman, T.J. | Engineering Index Backfile | 1931
      Keywords: Rails

      New 152-lb. Flat-bottomed rails, Pennsylvania railroad

      Skillman, T.J. | Engineering Index Backfile | 1931
      Keywords: Rails

      New 152-lb. Flat-bottomed rails, Pennsylvania railroad

      Skillman, T.J. | Engineering Index Backfile | 1931
      Keywords: Rails

      New 152-lb flat bottomed rails, Pennsylvania Railroad

      Skillman, T.J. | Engineering Index Backfile | 1932
      Keywords: Rails

      New 152-lb. Flat-bottomed rails, Pennsylvania railroad

      Skillman, T.J. | Engineering Index Backfile | 1931
      Keywords: Rails