TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS EP - 48 AU - World Health Organization LA - en LA - fr UR - https://iris.who.int/handle/10665/222340 JF - Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire DA - 1979 PY - 1979 IS - 06 SP - 41 TI - Weekly Epidemiological Record, 1979, vol. 54, 06 [full issue] VL - 54 ER -