title: The aging of America: questions for the four-generation society.
authors.forename: J A
authors.initials: JA
authors.lastname: Califano
mesh_terms: D000368:Aged; D000375:Aging; D005544:Forecasting; D006301:Health Services Needs and Demand / Q000191:economics; D006801:Humans; D011153:Population / Q000639:trends*; D011640:Public Policy; D012179:Retirement; D012959:Socioeconomic Factors; D014481:United States