1. The acute abdomen;Felson,1973
2. Roentgen Examinations in Acute Abdominal Disease;Frimann-dahl,1960
3. Department of inappropriate investigations;Goldberg;Br Med,1977
4. The Radiology of Emergency Medicine;Harris,1981
5. The roentgen diagnosis of pelvic extraperitoneal effusion;Harris;Radiology,1977