I found an article or book citation, now what do I do?
You can check which libraries own specific newspaper titles, books, etc. using the Worldcat online union library catalog. Worldcat allows you to limit your search by "newspaper" or "journal". Many of the newspapers, magazines and journals, and books indexed in Oregon Index Online are still in State Library collections.
Note that for newspaper titles, older issues will often be on microfilm or microfiche. Magazine or journal issues may be in paper or microfilm/fiche form.
Before you visit the library, be sure to check the holding library's local online catalog or call ahead to be sure they have year/issue that will contain the article you are looking for. You may also be able to get the article or book using interlibrary loan through your local library.