000 00307nam a2200133 a 4500
020 _a0316757764
050 0 0 _aRA652.2.M3
_bR67
100 1 _aRothman, Kenneth J.
245 1 0 _aModern epidemiology
260 _aBoston
_bLittle
_c1986.
300 _axvi, 358p.
_bill.
650 0 _aEpidemiology
942 _cBK
999 _c3871
_d3871