Original source material from British and European libraries and archives, including a strong core of document images from the Bodleian Library, Oxford and the British Library; Cambridge University Library; Leeds University Library; Birmingham Central Library; etc. Sources include ephemera, pamphlets, commonplace books, diaries, periodicals, letters, ledgers, manuscript journals, poetry, receipt books and conduct and advice literature.

Searchable database of several hundred subject encyclopedias and other reference works across all subject areas, but with particular strengths in the social sciences and humanities. It includes a number of major reference works, and is Northwesterns largest single collection of reference materials. A good source for authoritative background information.

Online version of many Oxford University Press reference works, ranging from specialized dictionaries and companions to major reference works such as the Encyclopedia of Human Rights, the Oxford Encyclopedia of Food and Drink, the Oxford Encyclopedia of Latinos and Latinas in the United States, and the Oxford Encyclopedia of Economic History, among many others.

Offers annotated bibliographies of the most important books and articles on specific topics in a growing range of subject areas. Particularly useful for anyone beginning research.

Online version of the Oxford English Dictionary (OED), widely regarded as the accepted authority on the English language.