"This multi-disciplinary database provides full text for more than 4,600 journals, including full text for nearly 3,900 peer-reviewed titles. PDF backfiles to 1975 or further are available for well over one hundred journals, and searchable cited references are provided for more than 1,000 titles."
JSTOR is an interdisciplinary digital library consisting of digitized issues of academic journals, books, and primary sources. It provides full text searches of almost 2,000 journals.