The International Bibliography of the Social Sciences (IBSS) is an essential online resource for social science and interdisciplinary research. IBSS includes over two million bibliographic references to journal articles and to books, reviews and selected chapters dating back to 1951. It is unique in its broad coverage of international material and incorporates over 100 languages and countries. 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.