The Bradford distribution is introduced and explained; its ambiguity, and relationship to the Zipf distribution are discussed. The general situation that might yield such a distribution is described and shown to fit the interaction between book users and books available. (Author)

Gives a model to interrelate the measures of service used in a library. (Author/PF)

A reduction of the loan period to one week for high use items increased student circulation by 20 percent. (LS)

Out-of-library circulation totals were found to be reliable indicators of in-library use. For predicting in-library use (and thus total use) two methods are cited: simple ratio of out to in, and the regression equation. (4 references) (Author/NH)

The circulation of medical periodicals within and among hospitals and medical libraries in Hungary. (LS)

Shows how simple probability theory can serve to remove the bias from a sample so that estimates of total yearly circulation and circulation distribution can be calculated from circulation desk data. (Author/PF)

A mathematical model is presented that can be used to predict a library's circulation. (Author)

A survey collected recorded library circulation statistics for 241 four-year liberal arts colleges and universities. While the survey identified several libraries with comparatively high circulation averages, it also indicated that for a great many institutions the per student rate of circulation books remains about the same as it was over 35…

A study to be made with computer-based circulation data of the non-use and use of a large academic library is discussed. A search of the literature reveals that computer-based circulation systems can be, but have not been, utilized to provide data bases for systematic analyses of library users and resources. The data gathered in the circulation…

Reports on a study in the public libraries of Champaign and Urbana, Illinois, to determine whether public library circulation of a sample of books will be greater for those volumes displayed in a prime location than for those in their regular places on the shelves. (FM)

Reports the findings of a six-year West Virginia University study that tested the "direct access" debate in its main library after undergoing the transition from closed to open stacks. Circulation, book availability, and search and library-use statistics are provided, and their implications are discussed. (Author/JD)

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)

The identifiable age grouping of the optimum circulation interval for journal usage is five years. Heaviest journal usage occurs during the first five years after its publication date; and beginning with the sixth year, use becomes so infrequent that requirements for return of the journal within two days creates unnecessary hardship on the user.…

A study of the reserve materials collection at the Main Library from a usage and cost analysis perspective revealed that 93.7% of all items that circulated could have been circulated an equal number of times through the standard circulation procedure which allows material to be used for seven days. The remaining 6.3% of the material which…