TY  - BOOK
AU  - Gordis, Leon,
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 721651372
SN  - 2
PY  - 1996///];copyright 1996.46
CY  - Philadelphia
PB  - W.B. Saunders
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Epidemiology
N1  - Includes biblioggraphical references and index; 5
ER  -