Oregon

1. Sreedhar, Shashwath / Coleri, Erdem (2018): Effects of Binder Content, Density, Gradation, and Polymer Modification on Cracking and Rutting Resistance of Asphalt Mixtures Used in Oregon. In: Journal of Materials in Civil Engineering (ASCE), v. 30, n. 11 (November 2018), S. 04018298.

   https://doi.org/10.1061/(asce)mt.1943-5533.0002506

2. Anderson, Jason C. / Unnikrishnan, Avinash / Schumacher, Thomas (2021): Heterogeneity-Based Survival Analysis of NBI Condition Ratings for Concrete Highway Bridge Decks in Oregon by Condition Group. In: Journal of Infrastructure Systems, v. 27, n. 4 (Dezember 2021), S. 04021029.

   https://doi.org/10.1061/(asce)is.1943-555x.0000636

3. Smith, Dwight A. / Norman, James B. / Dykman, Pieter T. (1989): Historic Highway Bridges of Oregon. 2. Ausgabe, Oregon Historical Society, Portland (USA), S. 323.
4. Walton, Elisabeth (1973): A Note on William W. Piper and Academy Architecture in Oregon in the Nineteenth Century. In: Journal of the Society of Architectural Historians, v. 32, n. 3 (Oktober 1973), S. 231-238.

   https://doi.org/10.2307/988795