PMCCPMCCPMCC

Search tips
Search criteria 

Advanced
Logo of pubhealthreporigLink to Publisher's site
 
Volume 45(30);  July 25, 1930
Article
Public Health Rep. Jul 25, 1930; 45(30): 1703–1762.
PMCID:
PMC2030506
Articles from Public Health Reports are provided here courtesy of
Association of Schools of Public Health