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An online tool that allows you to browse, read, and stay current with scholarly journals. Also available as an app for iOS, Android, and Kindle Fire devices.
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Not sure who Spivak is, or where the idea of public sphere came from? Look here! Each volume opens with a "Reader's Guide" that provides a general outline of the articles in the set, divided into four main sections: "Communication of Ideas," "Geographical Areas," "Chronological Periods," and "Liberal Arts Disciplines and Professions."