000 00273nas a22000977a 4500
008 170620b xxu||||| |||| 00| 0 eng d
022 _a00498114
245 _aWeekly Epidemiological Record
_b[Periodicals]
260 _aGeneva
_bWorld Health Organization
942 _2ddc
_cPE
_s1
999 _c140117
_d140117