A study of Ohio institutional library services and cooperation between such institutions and public libraries reports on library services in: institutions for the mentally ill and retarded, prisons, facilities for youthful offenders, and an orphanage. Profiles for 40 institutions include the institution's location, population, and client age range. Brief descriptions of library staff, collection, and cooperative activities are given. There are also comments on special features or activities of the institution or library. The narrative portion of the report discusses the need for cooperation between the public library and the institutions; the institution library covers its own special needs but must have a large general collection as a backup, and the public library needs the special knowledge available from local institutions so that it can more effectively serve people when they are released. recommendations are made for an expanded role for the state library in promoting cooperation between public and institutional libraries, particularly in the areas of regional cooperatives, finance, staff, leadership, planning, public relations, and providing audiovisual materials. (LS)