006910000a22001570004500003000900000005001700009110005700026245013600083264005700219490008000276300000900356041000800365650002600373651001100399246012300410PH-MaWHO20241108112413.0  aJoint OIHP/WHO Study-Group on African Rickettsioses.  aGroupe mixte OIHP/OMS d' Ttudes sur les rickettsioses africaines : rapport sur la premiFre session, Brazzaville, 8-14 fTvrier 1950.  aGenFve : bOrganisation mondiale de la SantT,c1950.  a(Organisation mondiale de la SantT. STrie de rapports techniques ; no. 23).  a23p.  afre  aRickettsia infections  aAfrica 1aJoint OIHP/WHO Study-Group on African Rickettsioses : report on the first session, Brazzaville, 8 to 14 February 1950.