Reviews studies of the duplication of holdings and acquisitions among libraries, concentrating on four types of research: (1) studies undertaken in connection with union catalogs, (2) studies of centralized processing, (3) studies of cooperative collection development, and (4) research studies on the phenomenon of collection overlap. A…

Describes a two-part book circulation use study conducted to find a simple inexpensive and effective method of weeding a public library branch collection, to determine whether weeding increases circulation, and to compare results with Slote's results. Seven tables, one appendix, and 32 references are provided. (RBF)

Evaluates the validity of using circulation data as the index to the total utilization of a library collection and tests the hypothesis that the proposed mixture of Poisson distributions can describe and predict various use distribution. Seven statistical analysis listings, six algorithms, 20 tables, and 43 references are provided. (Author/RBF)