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Your query returned 3 studies. Series results are grouped under the most relevant study. Ungroup series results to view all 3 results.

1.
Birthweight Data From the Philadelphia Almshouse Hospital, 1848-1873 (ICPSR 20701)
Goldin, Claudia; Margo, Robert A.
2.
Union Army Recruits in Black Regiments in the United States, 1862-1865 (ICPSR 9426)
Metzer, Jacob; Margo, Robert A.

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