000 00277nam a2200097Ia 4500
008 220809s1990 xx 000 0 und d
041 _aeng
245 _aWeekly Epidemiological Record Vol.64-65 Jan-Dec 1989-1990
260 _aGeneva
_bWHO, New Delhi
_c1990
520 _aBack Volume
999 _c159255
_d159255