[ON THE PROBLEM OF PROTECTIVE VACCINATION AGAINST TYPHOID FEVER].
D003604:Czechoslovakia; D006801:Humans; D014435:Typhoid Fever; D014436:Typhoid-Paratyphoid Vaccines; D014611:Vaccination
D014436:Typhoid-Paratyphoid Vaccines
CZECHOSLOVAKIA; TYPHOID-PARATYPHOID VACCINES
K PROBLEMATIKE OCHRANN'EHO O CKOVANIA PROTI BRU SN'EMU T'YFU.