The world's largest academic multi-disciplinary database, Academic Search Premier provides full text for nearly 4,500 journals, including full text for more than 3,600 peer-reviewed titles. PDF backfiles to 1975 or further are available for well over one hundred journals, and searchable cited references are provided for 1,000 titles. This database is updated on a daily basis via EBSCOhost. (Some full text)
Service = EBSCOadmin (databases)
Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites. -- copied from publisher's site (Some full text)
Service = Google