ANNUAL REPORT OF THE CZECHOSLOVAK INFLUENZA CENTRE: 1962.
D003604:Czechoslovakia; D004813:Epidemiology; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007251:Influenza, Human; D007390:International Agencies
CZECHOSLOVAKIA; EPIDEMIOLOGY; HEMAGGLUTINATION INHIBITION TESTS; INFLUENZA; INTERNATIONAL AGENCIES