TY  - BOOK
AU  - Crombie, I K
TI  - The pocket guide to critical appraisal : a handbook for health care professionals
SN  - 9780727910998
U1  - 362.1072 CRO 
PY  - 1996///
CY  - London
PB  - BMJ Publishing Group
KW  - Case-Control Studies -- Handbooks
KW  - Medicine--Research--Evaluation
N1  - Includes index
ER  -