000 00324nam a22001457a 4500
020 _a139781416025306
050 _aMED RA658
_bG58
100 _aGordis, Leon
245 _aEpidemiology
250 _a3rd. ed.
260 _aPhiladelphia
_bElsevier
_c2004
300 _axi, 335p.
_bill.
650 _aEpidemiology
942 _cBK
999 _c4735
_d4735