Hedblom, Carl A.2016-03-092016-03-091920-05https://hdl.handle.net/11299/178069University of Minnesota Ph.D. dissertation. May 1920. Major: Surgery. 1 computer file (PDF); 39 pages. [289-327]. Reprinted in Annals of Surgery.enSurgeryThe Treatment of Chronic EmpyemaThesis or Dissertation