TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS EP - 722 AU - Lwanga, S. CY - Geneva PP - Geneva C2 - 310717 C2 - 310717 LA - en UR - https://iris.who.int/handle/10665/261786 JF - Bulletin of the World Health Organization DA - 1978 PY - 1978 IS - 5 SP - 713 TI - Statistical principles of monitoring and surveillance in public health* VL - 56 KW - Update SN - 0042-9686 ER -