Nothing changes faster in today's library than reference services. The purpose of this collection of 24 articles is to help both the beginner and the experienced librarian keep up with that change through the explanations and points of view of leaders in the field. This volume, like the first three (1978, 1982, and 1986), brings together in a single, convenient place a representative view of today's reference and information services for students, teachers, and librarians. It can be used alone, or in conjunction with the author's 6th edition of Introduction to Reference Work (McGraw-Hill, 1992, 2 vols.). Most of the pieces in this collection are found as "suggested reading" in the Introduction.