1. Library service to older adults;Angelis,1989
2. Social forces in aging: An introduction to social gerontology;Atchley,1991
3. Snowball sampling: Problems and techniques of chain referral sampling;Biernacki;Sociological Methods and Research,1981
4. Factors influencing public library use;Bundy;Wilson Library Bulletin,1967
5. Library services for the aging;Casey,1984