000 00302nam a2200133Ia 4500
008 200512s9999 xx 000 0 und d
082 _a614.5
100 _aBhattachary
245 0 _aEpidemiology prinicples and practice
250 _a1
260 _bJp
_c2010
440 _v_
650 _aepidemiology
999 _c50586
_d50586