How old is "old"?
Subtitle: the effects of aging on learning and working : hearing before the Special Committee on Aging, United States Senate, Ninety-sixth Congress, second session, Washington, D.C., April 30, 1980.
Publisher: U.S. G.P.O.; For sale by the Supt. of Docs., U.S. G.P.O.
Published: 1980
Place of publication: Washington
Language: eng
Number of pages: 57
Subjects: Aging -- Longitudinal studies.
Notes: S/N 052-070-05469-7.