Catholic University of America Libraries researchers have a trial of Web of Science to use from June 1, 2012. 

Web of Science includes Science Citation Index, Social Sciences Citation Index, and Arts & Humanities Citation Index. Web of Science provides “Cited Reference Search” and subject searching through both “quick” and “advanced” searches. Our Web of Science subscription includes citations and references for articles in almost 9000 high quality, peer-reviewed journals published from 2002 to the present. Web of Science provides complete bibliographic data, searchable author abstracts, and cited references. Coverage is in the sciences (more than 6000 journals), followed by social sciences (approximately 1800 journals), and arts and humanities (approximately 1100 journals). For impact factor information about specific journals, users are directed to the index “Journal Citation Reports.”

Please find the CUA trial version of Web of Science from the  CUA University Libraries page:
Go to: Article Databases & More
Go to: Databases by Name and type in Web of Science

Fact sheet for Web of Science
Short tutorials for searching Web of Science

Find more information throughout the trial on the CUA Science Libraries Facebook page.