Web of Science Core Collection This link opens in a new windowWeb of Science Core Collection provides access to the world's leading citation databases: Sciences Expanded (1889+), Social Sciences (1898+), Arts & Humanities (1975+). Book citation index. (2005+), Conference Proceedings, Science (1990+), Conference Proceedings, Social Science & Humanities (1990+), Emerging Sources Citation (2005+), Current Chemical Reactions (1985+), and Index Chemicus (1993+).