Resource Overview Platform: Proquest Link to Resource Connect to Resource From ProQuest: The International Bibliography of the Social Sciences (IBSS) ... includes over two million bibliographic references to journal articles and to books, reviews and selected chapters dating back to 1951. ... Over 2,800 journals are regularly indexed and some 7,000 books are included each year. Abstracts are provided for half of all current journal articles and full text availability is continually increasing. Update Frequency: Biweekly, with approximately 100,000 new records added each year.