PMCCPMCCPMCC

Search tips
Search criteria 

Advanced
Logo of pubhealthreporigLink to Publisher's site
 
Volume 57(9);  February 27, 1942
Article
Public Health Rep. Feb 27, 1942; 57(9): 285–323.
PMCID:
PMC1968049
Articles from Public Health Reports are provided here courtesy of
Association of Schools of Public Health