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 The Kallikak Family: A Study in the Heredity of Feeble-Mindedness, by Henry Herbert Goddard, selected pages, multiple pages (#1455)
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 The Swedish Nation, pedigree of epilepsy in Swedish farmer lineage (#1633)
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 Jon Alfred Mjøen, director of the Vindern Biological Laboratory (Oslo, Norway) explaining pedigree to children Heljar, Sonja, and Fridtjof (#1580)
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 "Kallikak family of New Jersey -- normal line vs. degenerate line" (#1003)
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 Kallikak family pedigree (#291)
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 K. Bathurst letter to Francis Galton, about family records (10/12/1895), multiple pages (#2082)
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 Lamellar cataract pedigree by London Medical Office (#288)
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 Mary Dendy letter to Karl Pearson, about difficulties in collecting pedigree data and interpreting disease traits in "defective children" (12/9/1906), multiple pages (#1931)
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 "Mental Deficiency Pedigree," a multigenerational study of a rural family by the British National Association for the Feebleminded, multiple pages (#2213)
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 Morris Steggerda, photographs from his his own family pedigree (#2428)
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 "Nomenclature and Tables of Kinship," by Francis Galton, an appeal for comments on his survey of heredity, Nature (vol. 69:1787), multiple pages (#2199)
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Pedigrees