Judging progressive-era infant welfare in light of Fatal Years--and vice versa.
Meckel
R A
RA
D002648:Child; D003710:Demography; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007223:Infant; D007229:Infant Welfare / Q000266:history*; D009026:Mortality / Q000639:trends; D014481:United States / Q000453:epidemiology; D014504:Urban Health / Q000266:history