TY  - BOOK
AU  - Fletcher,Robert H.
AU  - Fletcher,Suzanne W.
AU  - Wagner,Edward H.
TI  - Clinical epidemiology: the essentials 
SN  - 0683032518, 9780683032512
AV  - RA652.2 F41
PY  - 1988///
CY  - Baltimore
PB  - Williams & Wilkins
KW  - Clinical epidemiology
KW  - Epidemiologic Methods
N1  - Includes bibliographies and index
ER  -