TY  - BOOK
AU  - Boyd,Mark F.
TI  - Preventive medicine,
AV  - RA425 .B73 1945
PY  - 1945///
CY  - Philadelphia, London
PB  - W.B. Saunders
KW  - Hygiene
KW  - Medicine, Preventive
N1  - Includes index; Bibliography: p. 560-566
ER  -