Draws on indexes such as the Nineteenth Century Short Title Catalogue, The Wellesley Index, Poole's Index and Periodicals Index Online to create integrated bibliographic coverage of over 1.4 million books and official publications, 64,891 archival collections and 15.6 million articles published in over 2,500 journals, magazines and newspapers. C19 Index now provides integrated access to 10 bibliographic indexes, including over 300,000 records from the ongoing digitization of British Periodicals Collection.