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The poor at birth : infant auxology and mortality at Philadelphia's Almshouse hospital, 1848 - 1873
Goldin, Claudia, (1988)
Accounting for racial differences in school attendance in the American South, 1900 : the role of separate-but-equal
Margo, Robert A., (1987)
Wages, prices, and labor markets before the civil war
Goldin, Claudia, (1989)