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  1. 1
    Staple Bend Tunnel : Allegheny Portage Railroad National Historic Site, Pennsylvania /
    Published 1991

    Government Document Book
  2. 2
    Steam over Scranton : the locomotives of Steamtown /
    by Chappell, Gordon S
    Published 1991

    Government Document Book
  3. 3
    Pennsylvania Railroad shops and works, Altoona, Pennsylvania /
    by Paige, John C
    Published 1989

    Government Document Book
  4. 4
    Pennsylvania Railroad shops and works, Altoona, Pennsylvania /
    by Paige, John C, Paige, John C
    Published 1989

    Government Document Book
  5. 5
    Staple Bend Tunnel : Allegheny Portage Railroad National Historic Site /
    Published 1991

    Government Document Book
  6. 6
    Staple Bend Tunnel : Allegheny Portage Railroad National Historic Site /
    Published 1991

    Government Document Book
  7. 7
    Study of alternatives : East Broad Top Railroad National Historic Landmark : draft /
    Published 1990

    Government Document Book
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