TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS AU - Smithells, R. W. LA - en UR - https://iris.who.int/handle/10665/45093 JF - World health forum 1995 ; 16(4) : 398-399 DA - 1995 PY - 1995 TI - Monitoring birth defects : and seeking the causes [letter] KW - Congenital, Hereditary, and Neonatal Diseases and Abnormalities KW - in infancy and childhood ER -