VATOPOULOS, AC MAINAS, E BALIS, E THRELFALL, EJ and KANELOPOULOU, M KALAPOTHAKI, V MALAMOULADA, H LEGAKIS, NJ, MOLECULAR EPIDEMIOLOGY OF AMPICILLIN-RESISTANT CLINICAL ISOLATES OF SALMONELLA-ENTERITIDIS, Journal of Clinical Microbiology, (32), 1322-1325, 1994, AMER SOC MICROBIOLOGY, 0095-1137, 1098-660X