TY  - BOOK
AU  - John Hopkins University
TI  - The school of hygiene and public health (vol-13)
T2  - 13
U1  - 614 
PY  - 1931///
CY  - U. S. A.
PB  - Baltimore
KW  - Health and Hygiene
KW  - Public health -- Epidemiology
N1  - Gift; health, hygiene, public health, epidemiology
ER  -