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The U.S. Army Corps of Engineers has been a strong presence in the Pacific Northwest since 1871. The Portland District's influence in the region is explained in William F. Willingham's book, Army Engineers and the Development of Oregon: A History of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee768e2e266104d9e1256337e22bdf88
https://doi.org/10.21236/ada627169
https://doi.org/10.21236/ada627169
