TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS EP - 460 AU - Berg, Gerald CY - Geneva PP - Geneva C2 - 4607010 C2 - 4607010 LA - en UR - https://iris.who.int/handle/10665/263631 JF - Bulletin of the World Health Organization DA - 1973 PY - 1973 IS - 5 SP - 451 TI - Removal of viruses from sewage, effluents, and waters VL - 49 KW - Articles SN - 0042-9686 ER -