From an examination of the data in several recent studies of interlibrary loans, an estimate of the present volume and general statements about interlibrary loan for all types of libraries in the United States are made. (Author/PF)

Describes a statistical model that can predict, throughout the fiscal year, the amount of money that will be spent on firm orders against a given fund, thereby predicting the number of orders that must still be placed to totally spend but not overspend that fund. Data tables are included. (Author/JD)

Describes a computer simulation model developed to provide information on the number of terminals or readers needed in the advent of microfilm or computerized catalogs in libraries. Systems with two to 14 terminals are simulated, and decision variables include average patron waiting time, number of patrons lost, and average terminal utilization.…