[SOME OBSERVATIONS ON THE EPIDEMIOLOGICAL SITUATION OF DIPHTHERIA IN POLAND DURING THE PERIOD 1960-1962].
D004165:Diphtheria; D004813:Epidemiology; D006801:Humans; D011044:Poland
DIPHTHERIA; EPIDEMIOLOGY; POLAND
KILKA UWAG O SYTUACJI EPIDEMIOLOGICZNEJ BLONICY W POLSCE W LATACH 1960-1962.