TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS EP - 423 AU - World Health Organization LA - en LA - fr UR - https://iris.who.int/handle/10665/238781 JF - Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire DA - 1948 PY - 1948 IS - 47 SP - 415 TI - Weekly Epidemiological Record, 1948, vol. 23, 47 [full issue] VL - 23 ER -