(Q40976148)
Statements
CONTROLLED FIELD TRIAL IN BRITISH GUIANA SCHOOL CHILDREN OF HEAT-KILLED-PHENOLIZED AND ACETONE-KILLED LYOPHILIZED TYPHOID VACCINES (English)
M. T. ASHCROFT
J. M. RITCHIE
C. C. NICHOLSON
1 March 1964
scientific article published on March 1964