Clackamas River Bridge

1. Hadlow, Robert W. (2001): Elegant Arches, Soaring Spans. C.B. McCullough Oregon's Master Bridge Builder. Oregon State University Press, Corvallis (USA), pp. 139.
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. 301 (Appendix G).