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- 20012486 contributor B598656.
- 20012486 created "1920.".
- 20012486 date "1920".
- 20012486 date "1920.".
- 20012486 dateCopyrighted "1920.".
- 20012486 extent "102 p.".
- 20012486 isPartOf "Carnegie Institution of Washington publication, no. 296".
- 20012486 issued "1920".
- 20012486 issued "1920.".
- 20012486 language "eng".
- 20012486 publisher "Washington, The Carnegie institution of Washington,".
- 20012486 subject "Eugenics.".
- 20012486 subject "HQ753 .K4".
- 20012486 subject "Heredity.".
- 20012486 title "Heredity and social fitness ; a study of differential mating in a Pennsylvania family, by Wilhelmine E. Key.".
- 20012486 type "text".