This classified annotated bibliography updates the standard sources needed by most small and medium-sized libraries for answering reference questions and improving collections. The brief, succinct annotations provide complete ordering information, which may make this a valuable tool for busy librarians.

**** The British counterpart to Sheehy (in which it is recommended--and vice versa), distributed in the US by Unipub. Volume 3 completes the 5th edition with 8,833 entries (vol. 1:Science and technology, 1989, 5,995 entries; vol.2: Social and historical sciences, philosophy and religion, 1990, 7,166 entries). While the majority of items are reference books, Walford is a guide to reference material and therefore includes periodical articles, microforms, online, and CD-ROM sources. A special effort has been made to make sure the output of small and specialist presses is not neglected. Annotation copyrighted by Book News, Inc., Portland, OR