Start with the MIT libraries' mega search. This contains the libraries full collection of books, full text articles, government. documents, and more. PRO TIP: For a more comprehensive search, click "expand beyond MIT collections" button at upper left of results to see many more articles which can be ordered via inter-library borrowing.
Google Scholar is great when you don't know the right search terms, or want to search citations
Access to over 2500 US and international news sources include newspapers, newswires, news journals, television and radio transcripts, blogs, podcasts, and digital-only websites. Coverage: 1980-current (depending on title)