For off-campus access to library online resources, remember to follow the links from CLIO or this research guide. You can also use the proxy bookmarklet.
Can't find an article through our libraries' collections? Use Interlibrary Loan (ILL) to request a copy for free.
Like all sources you encounter, be sure to evaluate the relevance, quality, and perspective of works put out by think tanks and research institutes.
Evaluating Resources from the University of California Berkeley clearly presents key questions you want to ask of your sources: