Remarks on the relative permanence and durability of three types of film in use in library microform reproduction (silver, diazo, and vesicular) and points out some technical and economic facts that govern the choice of microform materials for libraries. A 6-item reference list is included. (Author/JL)

Designed to provide the librarian with suggestions and guidelines for storing and preserving audiovisual materials, this pamphlet is divided into four major chapters: (1) Normal Use Storage Conditions; (2) Natural Lifetime, Working Lifetime and Long-Term Storage; (3) Handling; and (4) Shelving of Normal Use Materials. Topics addressed include:…

Discusses need for microforms (high costs, inaccessibility, space requirements, and deterioration of printed materials), selection of microform materials, and maintenance of microform equipment for library microform services in Nigeria. Results of a study of print material usage at the University of Lagos Library are presented. Eight sources are…