Iltis, Deanna. “Thirty Years of Union Listing in Oregon - Reflections on ORULS and Its Predecessors”. OLA Quarterly 4, no. 4 (January 1, 1999): 12–13+. Accessed July 3, 2024. https://journals3.library.oregonstate.edu/olaq/article/view/vol4_iss4_7.