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OnePetro

OnePetro is an online library of technical literature for the oil and gas exploration and production (E&P) industry. With contributions from 18 publishing partners and providing access to over 160,000 items, OnePetro.org is the definitive resource on upstream oil and gas.

Opposing Viewpoints

Opposing Viewpoints In Context is an engaging online experience for those seeking contextual information and opinions on hundreds of today's hottest social issues. Drawing on the acclaimed Greenhaven Press series, the solution features continuously updated viewpoints, topic overviews, full-text magazines, academic journals, news articles, primary source documents, statistics, images, videos, audio files and links to vetted websites organized into a user-friendly portal experience.

Oxford Art Online

Provides Web access to the entire text of The Dictionary of Art (1996, 34 vols.) plus extensive image links and all the sophisticated search advantages possible with an online reference source.

Oxford Music Online

An integrated music resource on the web, including the full text of The New Grove Dictionary of Music and Musicians (second edition), The New Grove Dictionary of Opera and The New Grove Dictionary of Jazz (second edition).

Oxford Reference

Contains about 100 dictionary, language reference, and subject reference works published by Oxford University Press.