41585The epidemiological significance of some recent findings from research on antigenic variation in trypanosomesJournal articles · December 31, 1969
41586Contribution à l'étude du tréponème isolé du singe par A. Fribourg-BlancJournal articles · December 31, 1969
41587NOTE ON GEOGRAPHIC AREAS = NOTE SUR LES UNITÉS GÉOGRAPHIQUESJournal articles · December 31, 1969
41589A controlled field trial to evaluate the protective capacity of a single dose of acetone-killed agar-grown and heat-killed broth-grown typhoid vaccines*Journal articles · December 31, 1969
41592The critical level of interference in species eradication of mosquitos*Journal articles · December 31, 1969
41593Antibody levels detected by the fluorescent antibody technique in mice infected with Plasmodium vinckei and P. chabaudi*Journal articles · December 31, 1969
41596The use of an epidemiological model for estimating the effectiveness of tuberculosis control measuresJournal articles · December 31, 1969
41597Evolution of the clinical gradient of Schistosoma mansoni infection in a small town in north-eastern Brazil.Journal articles · December 31, 1969
41598VACCINATION CERTIFICATE REQUIREMENTS FOR INTERNATIONAL TRAVEL = CERTIFICATS DE VACCINATION EXIGÉS DANS LES VOYAGES INTERNATIONAUXJournal articles · December 31, 1969
41599WIRELESS STATIONS TRANSMITTING WHO RADIOTELEGRAPHIC EPIDEMIOLOGICAL BULLETINS = STATIONS TRANSMETTANT LES BULLETINS ÉPIDÉMIOLOGIQUES RADIOTÉLÉGRAPHIQUES DE L’OMSJournal articles · December 31, 1969