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Pedigrees of Negro families / R. Ruggles Gates; Gates, R. Ruggles (Reginald Ruggles), 1882-1962; Philadelphia : Blakiston Company, 1949; Includes bibliographical references and index;""Abnormalities of the eye and ear -- Abnormalities of the skin and teeth -- Abnormalities of the limbs -- Inheritance of various anatomic traits and twinning -- Inheritance of some physiologic and constitutional conditions -- Normal nervous and mental conditions -- Abnormal nervous and mental conditions -- Inheritance of racial characters : stature and size -- Inheritance of racial characters : head shape

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