TY - JOUR A1 - Glass, T.A. A1 - Mendes de Leon, C.F. A1 - Seeman, T.E. A1 - Berkman, L.F. T1 - Beyond single indicators of social networks: a LISREL analysis of social ties among the elderly Y1 - 1997 DO - 10.1016/S0277-9536(96)00270-5 JF - Soc Sci Med VL - 44 IS - 10 ER -