CEVAP:

Library Catalogs. The library catalog enables researchers to search and locate print and online materials (books, journals, and other resources) held in the library. A journal may be available with an online link from the library catalog but some content may not be allowed to access. Instead, the library catalog may direct you to an available link that provides the content you search for (Jesson, Matheson and Lacey, 2011, 36). Library catalog or Online Public Access Catalogues (OPACs) give the bibliographical details and locations of all the publications held within a specific library.