000 00272nam a2200109Ia 4500
008 220729s1991 xx 000 0 und d
041 _aeng
100 _aParker D J P
245 _aPractical epidemiology
250 _a4
260 _aEdinburgh
_bChuachill Livingstone
_c1991
999 _c130259
_d130259