PMCCPMCCPMCC

Search tips
Search criteria 

Advanced
Logo of pubhealthreporigLink to Publisher's site
 
Volume 64(23);  June 10, 1949
Article
Public Health Rep. Jun 10, 1949; 64(23): 717–748.
PMCID:
PMC1996975
Articles from Public Health Reports are provided here courtesy of
Association of Schools of Public Health