NOTE: For Supreme Court cases before 1875, the Bluebook requires the name and volume of the series in which the case appears. The list of nominative reporters is as follows:
For other Federal cases, search the case on Westlaw and select Download Original Image (PDF).

You can also check the hard copy reporter in the law library. Older volumes are in storage and will be retrieved upon request.
PDFs of state cases can be found on Westlaw. Search for the case and select the Download Original Image (PDF).
Federal and state case briefs are generally available on Westlaw, LexisNexis, and Bloomberg Law.
Look up the case, then depending on the database:
For federal cases, check for coverage in Westlaw, LexisNexis, and Bloomberg Law. If a document is not available on Westlaw, Lexis or Bloomberg, it may be available in PACER (Public Access to Court Electronic Records).
The law library has a subscription to PACER but because charges are incurred for accessing documents, a law librarian must mediate a PACER request. Email lawref@uoregon.edu and provide the docket number and date of the document from the article (if it's not in the article, try searching the court’s website or Google).