Library collection weeding criteria based upon unequal distribution of demand require that distribution remain stable over time. A mathematical expression is derived that tests that stability. Verification is not inordinately time consuming and is facilitated by the use of automated circulation systems. (Author/RAA)

Describes a study that investigated factors associated with frequency of use of ERIC CD-ROM in an academic library, including gender, age, level of familiarity with computers, and level of study. The implications of the findings for the allocation of library resources and personnel to meet users' needs are discussed. (11 references) (CLB)

Analyzes queueing statistics to determine their utility in predicting catalog usage and the relationships between card and serials catalogs and to pinpoint peak catalog usage. This measurement should provide one factor in a simulation model to accurately predict the number of catalog devices needed for alternative catalog formats. Eight references…