EXPERIENCES WITH SEROLOGICAL RESEARCH ON TRANSMISSIBLE INFECTIONS IN THE SOUTHERN REPUBLICS OF THE U.S.S.R.
D004813:Epidemiology; D006385:Hemagglutination Inhibition Tests; D012106:Research; D014586:USSR; D014777:Virus Diseases
EPIDEMIOLOGY; HEMAGGLUTINATION INHIBITION TESTS; USSR; VIRUS DISEASES