TY - RPRT TI - Factor analytic study of depressive disorders. AU - M Biro AU - E Till PY - 1989 DO - 10.1002/1097-4679(198905)45:3<369::aid-jclp2270450304>3.0.co;2-d UR - https://pubmed.ncbi.nlm.nih.gov/2745726/ ID - 2745726 ER -