Shepperd's Dell Bridge

1. Jackson, Donald C. (1984): Great American Bridges and Dams. A National Trust Guide. John Wiley & Sons, New York (USA), pp. 303.
2. Smith, Dwight A. / Norman, James B. / Dykman, Pieter T. (1989): Historic Highway Bridges of Oregon. 2^nd edition, Oregon Historical Society, Portland (USA), pp. 323.