65. UMEA UNIVERSITY MEDICAL DISSERTATIONS. NEW SERIES 552,630 HARDELL LENNART Epidemiological studies on soft-tissue sarcoma and malignant lyphoma and their relation to phenoxy acid or chlorophenol exposure : [akademisk avhandling] / by Lennart Hardell ; from the Department of Oncolo­ gy, University of UmeA Sweden, and the Department of Occupational Medicine, University of Linkdping, Swe-­ den. - Umea : University, 1981. - 139 s. ; 21 c, (Umea University Medical Dissertations. New Se-­ ries, ISSN 0346-6612 ; nr 65)