RT Journal Article SR Electronic T1 Some Gastroscopic Observations in Gastric Ulcer JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 123 OP 131 VO 7 IS 2 A1 Renshaw, John F. YR 1940 UL http://www.ccjm.org/content/7/2/123.abstract AB