A core resource for the identification and evaluation of reference materials, cited in BCL3 and Sheehy. While the majority of items are books, periodical articles, microforms, and online and CD-ROM sources are also represented. This revised and updated volume includes many 1998 publications as possible, together with some items published early in 1999. Some 700 items have been added, bringing the total to 7,594. No schedule is given for publication of volumes 2 and 3, but presumably the complete project will follow three-year cycle established with previous editions.