000 00304nam a22001337a 4500
020 _a0272794074
050 _aMED RA651
_bR6
100 _aRobert, C.J.
245 _aEpidemiology for clinicians
260 _aLondon
_bPitman Medical
_c1977
300 _a198p.
_bill.
650 _aEpidemiology
942 _cBK
999 _c3688
_d3688