Seventy percent of the database consists of periodical articles. Biological Abstracts - Covers major subject areas related to biology. Indexes both journal articles and educational research documents for grades K-12 and University level. PsycInfo - The PsycINFO database covers the professional and academic literature in psychology and related disciplines including medicine, psychiatry, nursing, sociology, education, pharmacology, physiology, linguistics, and other areas. Over 50,000 references are added annually.
Popular literature is excluded.
Search indexes include cited author, subject and corporate entries. The source index provides complete citation and information for entries located in the indexes mentioned previously. Subject searching is limited to keywords from article titles. Citations from over 3000 major journals covering about 100 scientific disciplines. Dissertation Indexes Dissertation Abstracts International - Database contains comprehensive coverage of American dissertations.