The desirability and format of a network among libraries and resource centers serving the gerontological/geriatric field were addressed in a research project funded by the Special Libraries Association. Heads of 50 gerontological and 50 geriatric libraries were surveyed by mail to determine if there was interest in a joint network, i.e., a formal cooperative venture among several libraries through the sharing of services and resources, and to find out what a network should and could offer its participants. Though gerontological and geriatric libraries were initially separated for data analysis, all results assumed a joint network. Results indicated that the majority of the respondents favored such a network and that their sponsoring organizations would support it. A majority would pay a membership fee and would prefer a designated network headquarters. Bibliographic projects were ranked as the most important network activity by 95% of the respondents, and a comparison of products and services available and those desired indicated that the most likely products and services to be available are interlibrary loan, publications, journal holding lists, clearinghouse functions, bibliographic computer searches, union catalogs, and SDI (selective dissemination of information). (LMM)