Discusses the multilevel information system (MLIS), a retrieval system that integrates functions typical for database management systems and retrieval-oriented systems and provides several levels of data accessing, each developed for a different class of users. Twenty-two sources are cited. (FM)

This case study describes the application of an analytical library network model to data collected during April 1977. Models are developed for describing the intralibrary processing activities encountered at each of the resource libraries in the study, and alternative routing policies for referring requests among resource libraries are analyzed. A…

The computer-based system for routing school buses in rural areas which is discussed minimizes both transportation costs and the average student ride time. Route generation methodology is described and a flowchart of the algorithm is included. (Author/JJD)

Progress on the development of a mathematical model and associated computer programs for use by the Illinois State Library in evaluation and planning of the interlibrary loan (ILL) network is summarized. Pertinent published literature on ILL networks is reviewed in terms of network structure, operations, satisfaction of requests, and costs. A flow…