The resemblance of siblings in intelligence and achievement - Hildreth, Gertrude Howell, 1898-1984. (AMS Press : New York, 1972)
Reprint of the 1925 ed., issued in series: Teachers College, Columbia University. Contributions to education, no. 186.
Originally presented as the author's thesis, Columbia.
Bibliography: p. 64-65.
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Keywords: Heredity; Intelligence tests; Brothers and sisters