These databases will help you find secondary sources--mostly articles, but some books and other resources.
Provides online full-text access to the archives of more than 1300 scholarly journals, some of which date from the 19th century. JSTOR does not include recently published articles. Due to publisher restrictions, there is a gap, typically from 1 to 5 years, between the most recently published journal issue and the issues available in JSTOR.
WorldCat.org lets you search the collections of libraries in your community and thousands more around the world.
Academic Search Complete is a multi-disciplinary database that provides citations and full-text for articles published in nearly 5,740 journals, including more than 5,310 peer-reviewed titles.