TY  - BOOK
AU  - Welch, w. h. (Ed)
TI  - American journal of hygiene
T2  - 67-68
U1  - 614.05 
PY  - 1958///
PB  - Johns hopkins press, baltimore
KW  - Health and Hygiene
KW  - Hygiene--Periodicals | Epidemiology--APHA--Historical
N1  - Hygiene; Public Health; American; Epidemiology; Preventive Medicine
ER  -