Preliminary report of Spearman-Holzinger unitary trait study.

Twins : a study of heredity and environment / by Horatio H. Newman, Frank N. Freeman, Karl J. Holzinger.

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Karl Holzinger

Works from the collections

Preliminary report of Spearman-Holzinger unitary trait study.

Twins : a study of heredity and environment / by Horatio H. Newman, Frank N. Freeman, Karl J. Holzinger.