A study of alternative models for establishing a cooperative storage center for little used library materials by the members of the Area College Libraries of Central Pennsylvania (ACLCP) focused on periodicals. Considerations discussed include advantages--lower cost; space for growth and better access to holdings retained in active collections; decreased duplication by continuous weeding; possibility of creating a depository for outdated government documents and a single copy file of outdated reference service items; (2) models provided by existing systems: Hampshire Inter-Library Center--a jointly owned research collection supplementing library holdings of participating institutions; Center for Research Libraries--a scholarly store of seldom used potential research materials; New England Deposit Library--overflow of materials from 12 major libraries in the Boston Area; and Medical Library Center of New York--medical journals, texts, and monographs transferred from 30 medical libraries in New York City; and (3) storage options for ACLCP--a decentralized system where each library copes with its own storage problems; a shared retention plan; the creation of a physically separate cooperative storage center; or participation in a storage center operated on a statewide or larger scale. Recommendations favor creation of a separate facility for ACLCP libraries. (Author/MBR)