Developed to provide a programmed instruction tutorial for student assistant shelvers in the General Reference Division at San Diego State University (SDSU) Library, this manual presents five teaching units: (1) an introduction to the resources and services available in General Reference, which includes reference materials for all fields in the social sciences, humanities, education, and business administration; (2) an overview of classification systems and description of those used at SDSU; (3) how to reshelve materials according to the Library of Congress classification; (4) locations of materials in General Reference; and (5) recognizing and returning materials to other divisions of the library. Correct answers for unit questions are provided at the end of each unit. (CGD)