Guidelines are provided for audiovisual materials and services in public libraries serving a population of 150,000 or less. A glossary of terms is followed by definitions of responsibility at the federal, state, regional, and local levels. A minimum allocation of 15% of the materials budget for audiovisual resources is recommended. Necessary supporting services are listed, and minimum standards, based on population, are stated for specific kinds of materials. Local personnel needed to run an audiovisual program are described, and nine recommendations are made for minimum space and equipment, with specific equipment itemized. Finally, standards for maintaining statistical data are given. A form for listing holdings data is appended. (LS)