Contains indexing for over 8,200 publications, with full text for nearly 4, 650 of those titles. PDF back files to 1975 or further are available for well over one hundred journals, and searchable cited references are provided for more than 1,000 titles. Academic Search Premier contains...full text coverage in biology, chemistry, engineering, physics, psychology, religion & theology, etc.
Coverage: 1954+ References to journal articles and articles in collections, citations to abstracts of dissertations, and citations to books on the history of the world (excluding the United States and Canada) from 1450 to the present.
(Indexing: 1975+) Citations, abstracts and indexing of the international serials literature in political science and related fields, including international relations, law, and public administration/policy.
Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations.