The nature of the use and users of the Midwest Regional Medical Library.

Using a 10 percent random sample of all requests submitted to the Midwest Regional Medical Library during 1968-1969, this study has revealed that physicians constitute the user group making the most requests, that physicians request periodical materials most, that 86.6 percent of materials requested were for periodicals, and that over one-third of materials requested was more than ten years old. It was found that 66.3 percent of requests were filled, that "Pathology, Diseases, and Treatment" was the subject category with the highest percentage of requests, and that this category and Materia Medica were the subjects accounting for over 50 percent of the requests from all users. The subject categories most frequently requested by physicians were found to be the same (Pathology, Diseases, and Treatment and Materia Medica) as for educators and researchers. The most requests from students were in the Materia Medica and "other" subject categories. These findings are significant for drawing up acquisition policy for both the John Crerar Library, which supplies the physical facilities for the MRML, and the borrowing library which submits the requests for users.