TY  - JOUR
A1  - Umberson, D.
A1  - Wortman, C.B.
A1  - Kessler, R.C.
T1  - Widowhood and depression: Explaining long-term gender differences in vulnerability
Y1  - 1992
DO  - 10.2307/2136854
VL  - 33
IS  - 1

ER  -