Twins T and C from infancy to adolescence
Subtitle: a biogenetic study of individual differences by the method of co-twin control
By: by Arnold Gesell and Helen Thompson. Finger nail-biting: its incipiency, incidence, and amelioration, by Albert LeRoy Billig. An experimental study of the factors of maturation and practice in the behavioral development of the embryo of the frog, Rana pipiens, by Allan Fromme.
Contributors: Thompson, Helen, 1897- joint author.; Billig, Albert LeRoy.; Fromme, Allan, 1815-   .
Series: Genetic psychology monographs,; v. 24, no. 1
Publisher: The Journal press
Published: 1941
Place of publication: Provincetown, Mass
Language: eng
Number of pages: 256
Subjects: Difference (Psychology); Nail-biting; Frogs; Twins
Other titles: Nail-biting.
Notes: "References" at end of each study.
Each study has also special t.-p.
The second study issued also as thesis (D. Ed.) Temple university.