TY  - BOOK
AU  - Welch, W. H.
AU  - Howell, W. H.
TI  - American journal of hygiene
T2  - 26
U1  - 614.05 
PY  - 1937///
PB  - School of Hygiene and Public Health of The Johns Hopkins University
KW  - Health and Hygiene
KW  - Hygiene--Periodicals | Epidemiology--APHA--Historical
N1  - Hygiene; Public Health; American; Epidemiology; Preventive Medicine
ER  -