This service is Google's method of searching the invisible web. To see the full text of many of these sources, you need to be "authenticated" as a legitimate UIUC user. Do so by searching for the source title on the A-Z list of electronic journals and newspapers. Also try the advanced search.
Create citations in APA, MLA or Chicago Style using a step-by-step process.

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Provides page images of back issues of the core scholarly journals in the humanities, social sciences, and basic sciences from the earliest issues to within a few years of current publication. Users may browse by journal title or discipline, or may search the full-text or citations/abstracts. New issues of existing titles and new titles are added approximately on a weekly basis. The University of Illinois has access to the following JSTOR collections: Arts & Sciences I-XV, 19th Century British Pamphlets, Business IV, Global Plants, Hebrew Journals, Ireland, Life Sciences Collection, Lives of Literature, Security Studies, Struggles for Freedom - South Africa, Sustainability, and World Heritage Sites - Africa.
UIUC Online Catalog - Searches all UIUC libraries.
You can use subject headings to refine your search. So if, for instance, you are looking for specific ethnic and racial history or statistics of the city of Chicago, you can use these headings:
Chicago (Ill.)—Ethnic relations
Chicago (Ill.)—Statistics
Just copy and paste one of the above headings into the search field, and select "Subject" as the category.
If a book is not available at UIUC . . .