000 00390nam a2200145Ia 4500
008 241014s9999||||xx |||||||||||||| ||und||
020 _a0-316-76599-6
060 _aWA950 S 1991
100 _aSackett,David L
245 0 _aClinical Epidemiology : A Basic Science for Clinical Medicine
260 _bLittle Brown & Co
_c1991
300 _a441
650 _aEpidemiology
942 _bION
_cBK
999 _c17817
_d17817