000 00384cam a2200145 a 4500
020 _a0521439795
050 0 0 _aRA652.4
_bS55
100 1 _aSilman, Alan J.
245 1 0 _aEpidemiological studies : a practical guide
260 _aCambridge
_bCambridge University Press
_c1995
300 _axiv, 175p.
_bill.
650 0 _aEpidemiology
650 1 2 _aEpidemiologic Methods.
942 _cBK
999 _c4535
_d4535