TY  - BOOK
AU  - Fletcher,Robert H.
AU  - Fletcher,Suzanne W.
AU  - Wagner,Edward H.
TI  - Clinical epidemiology: the essentials 
SN  - 0683032526
AV  - RA652 .F55 1982
PY  - 1982///
CY  - Baltimore
PB  - Williams & Wilkins
KW  - Clinical epidemiology
KW  - Epidemiology
N1  - Includes bibliographical references and index
ER  -