000 00328nam a2200097Ia 4500
008 220729s1987 xx 000 0 und d
041 _aeng
100 _aWHO
245 _aPrinciples of studies on diseases of suspected chemical etiology and their prevention
260 _aWeb result with site links
_bWHO Regional Publications
_c1987
999 _c128025
_d128025