EVALUATION OF 419 PEPTIC ULCER PATIENTS REFERRED WITH BLEEDING AND NON BLEEDING - ÖZDEN, Ali; DÖNDERİCİ, Ömer; SAMUR, Mustafa; DUMLU, Şükrü; BEYLER, Ali Reşit; UZUNALİMOĞLU, Özden (Turkish Journal of Gastroenterology, 1993)