TY  - BOOK
AU  - Boyd,Mark,F.
TI  - Preventive medicine
U1  - 614 
PY  - 1945///
CY  - Philadelphia
PB  - W.B. Saunders
KW  - Medicine, Preventive
KW  - Preventive health Services
KW  - Public health
KW  - National health Services
N1  - Includes index
ER  -