TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS EP - 257 AU - World Health Organization LA - en LA - fr UR - https://iris.who.int/handle/10665/221828 JF - Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire DA - 1931 PY - 1931 IS - 17 SP - 243 TI - Weekly Epidemiological Record, 1931, vol. 06, 17 [full issue] VL - 06 ER -