摘要:AFTER the problems of selection, ordering, cataloging and classification, the neophyte in the library is often left to assume that library holdings like the fairy-tale prince and princess "live happily ever after." After all records have been completed and the book begins its service to the reader, most of its effectiveness will depend on the continual care and supervision given by the circulation department of the library. The speed and accuracy with which the book can be located and placed in the hands of the borrowser is based on the availability of the books and on proper records at the circulation desk. The best possible service is a primary requirement in the special reference libraries which include those serving the medical and allied professions. This paper will discuss the records used for lending books and periodicals from a library of 70,000 volumes serving both the medical and nonmedical personnel of the Mayo Clinic.