TY  - BOOK
AU  - Elwood, J. Mark
TI  - Critical appraisal of epidemiological studies and clinical trials
SN  - 0192627449(pbk)
U1  - 614.4028 
PY  - 1998///
CY  - Oxford
PB  - Oxford University Press
KW  - EPIDEMIOLOGY
KW  - Epidemiological Studies
KW  - Clinical Trials
KW  - Research methods
ER  -