KOENIG, E C Retroperitoneal perforation of the duodenum; report of a case. [electronic resource] - Radiology Feb 1947 - 164-7 p. digital Publication Type: Journal Article ISSN: 0033-8419 Standard No.: 10.1148/48.2.164 doi Subjects--Topical Terms: DuodenumHumansRetroperitoneal Space