TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS EP - 342 AU - World Health Organization LA - en LA - fr UR - https://iris.who.int/handle/10665/210310 JF - Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire DA - 1955 PY - 1955 IS - 29 SP - 329 TI - Weekly Epidemiological Record, 1955, vol. 30, 29 [full issue] VL - 30 ER -