RT Article T1 Psychiatric history and stress: predictors of severity of unipolar depression JF Journal of abnormal psychology VO 101 IS 1 SP 45 OP 52 A2 Hammen, Constance A2 Davila, Joanne A2 Brown, Gary A2 Ellicott, Aimee Gibson A2 Gitlin, Michael LA English YR 1992 UL https://krimdok.uni-tuebingen.de/Record/1639976507 K1 Depression K1 Kritische Lebensereignisse