Information System: Alder ^ a b c McArthur, Lewis A.; Lewis L. McArthur (2003) [1928]. Oregon Geographic Names (7th ed.). Portland, Oregon: Oregon Historical Society
for 2018 and 2019 ^ Intel’s Tiger Lake processor, designed and built in Oregon, aims to make up lost ground in chip market ^ https://compubench.com/device
Transport Systems. Janes Information Group. pp. 526. ISBN 978-0710629036 ^ “Oregon Iron Works gets contract for streetcar” (英語). Portland Business Journal