In this paper the amount of frustration in a section of books is derived from a model that includes the effects of variable book circulation and the nondeterministic nature of book use. (Author/DH)

A model for an information retrieval system in which recall and precision are inversely related is described, and then the anomaly is resolved. (PF)

Though unshelved books are a problem in every library, little systematic effort has been made to design an optimal solution. Presented here is a mathematical model that attempts to approach such a solution. (2 references) (Author/DH)

The question of whether a library's catalog should consist of cards arranged in a single alphabetical order (the "dictionary catalog) or be segregated as a separate file is discussed. Development is extended to encompass related problems involved in the creation of a book catalog. A model to study the effects of congestion at the catalog is…

A mathematical model is given for predicting the growth of a card catalog and planning card redistribution. (PF)