2WHO/UNICEF/ICCIDD. Assessment of iodine defieiency disorders and monitoring their elimination: a guide for program managers [ R ]. Geneva : WHO, 2001 : 1- 107.
1WHO/UNlCEF/IOCiDD.Assessment of iodine defieiency disorders and monitoring their el imination:a guide for program managers[P].Geneva:WHO, 2001 .1-107.