PsycINFO is considered the world's largest resource of peer-reviewed literature on behavioral science and mental health. It is updated weekly, and contains nearly 4 million bibliographic records, including over 2 million DOIs which allow direct linking to full text.
"contains approximately 3 million citations and summaries dating as far back as the 1600s with DOIs for over 1.4 million records. Ninety-eight percent of the covered material is peer-reviewed. The database also includes information about the psychological aspects of related fields such as medicine, psychiatry, nursing, sociology, education, pharmacology, technology, linguistics, anthropology, business, law and others. Journal coverage, which spans from the1800s to present, includes international material selected from around 2,500 periodicals in dozens of languages."
* 1927-1947 Microfilm BF1.P65
* 1948-2004 print in remote storage