00595nam a22002297i 4500 20141212094935.0 991228s1999 sp gr 000 0 spa c eng COOPER, B.S. WHO ARE OUR SENIORS?. A PROFILE OF MEDICARE BENEFICIARIES Características usuario Personas mayores Servicios de salud EE.UU. Mayores Documental POLICY AND PRACTICE Vol. 57, no. 3 (1999), p. 15-23 13 AR 19991228 R.1197 AR