[CONTRIBUTION TO THE PROBLEM OF THE EPIDEMIOLOGY OF INFLUENZA IN SLOVAKIA].
D003604:Czechoslovakia; D004813:Epidemiology; D006801:Humans; D007251:Influenza, Human; D018154:Slovakia
CZECHOSLOVAKIA; EPIDEMIOLOGY; INFLUENZA
PR'ISPEVOK K EPIDEMIOL'OGII CHR'IPKY NA SLOVENSKU.