1. 1
    Published 1920
    In collection: Published Materials
    Subjects: '; ...Bridges Pennsylvania Philadelphia....
    Book
  2. 2
  3. 3
    Subjects: '; ...Bridges Pennsylvania Philadelphia Design and construction....
    Book
  4. 4
  5. 5
    Published 1919
    In collection: Published Materials
    Subjects: '; ...Bridges Pennsylvania Philadelphia....
    Book
  6. 6
    Published 1834
    In collection: Published Materials
    Subjects: '; ...Toll bridges Pennsylvania Philadelphia....
    Book
  7. 7
    Published 1834
    In collection: Published Materials
    Subjects: ';
    Conference Proceeding Book
  8. 8
  9. 9
  10. 10
  11. 11
    Published 1862
    In collection: Published Materials
    Subjects: ';
    Book
  12. 12
  13. 13
  14. 14