As the population continues to age, gerontological research will become increasingly important and library holdings in gerontology and geriatrics will be in great demand. This valuable reference discusses the history of gerontology and geriatrics libraries in the United States and Canada and profiles their holdings. The study is based on a questionnaire distributed to public and private gerontology and geriatrics libraries. Data from the questionnaire are presented in brief but informative profiles. Each profile lists the type of library, its chief administrator, the date of its founding, the hours during which it is open, and its holdings, services, and facilities. The result is an illuminating overview of information centers available for the study of geriatrics and gerontology. Joyce A. Post begins with an extensive discussion that traces the history of library collections in gerontology and geriatrics, including the impact and importance of federal assistance and the creation of geriatric education centers. The next section discusses the author's research methodology and offers an analytical summary of her findings. The directory that follows is arranged alphabetically by state and then by towns within each state. The appendixes present the questionnaire used to obtain the data and a listing of the library holdings of 18 major gerontology and geriatrics periodicals. The useful and varied indexes make this work an indispensable and easy to use reference for gerontologists, librarians, and all those interested in research on the elderly.