TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS EP - 190 AU - World Health Organization LA - en LA - fr UR - https://iris.who.int/handle/10665/239925 JF - Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire DA - 1951 PY - 1951 IS - 18 SP - 181 TI - Weekly Epidemiological Record, 1951, vol. 26, 18 [full issue] VL - 26 ER -