WorldCat now includes the Library of Congress Subject Headings as a searchable thesaurus. Users can search the thesaurus directly to find valid terms or move from a bibliographic record to a list of subject headings. Viewing the full thesaurus records allows the user to see notes, related headings, subdivisions and more. PowerTables, a new module now required for all subscriptions to Statiscial Universe, has been added. PowerTables Base Edition, which is available free for now, offers users the ability to find statistical data without any prior knowledge of CIS products.
Users can search directly for a table based on subject, coverage date and other criteria.
Each table is accompanied by a link to the CIS abstract describing the document and a .pdf file of the complete document. PowerTables contains more than 25,000 tables with source materials from federal, state and international publications. Additional tables are being added this year, and 25,000 new tables will be added annually. Last month BCR and H.W. Wilson jointly announced a three-month free trial of Wilson databases available to all BCR libraries now through November 30. To date BCR has had a great response.