Title: Twins and twin relations

Authors: Koch, Helen L.

Book title: Twins and twin relations

Journal article page numbers: 3-50

Journal article title: Some personality correlates of sex, sibling position, and sex of sibling among five- and six-year old children

Journal name: Genetic Psychology Monographs

Journal volume: 52

Media type: Book

Publisher: Chicago:University of Chicago Press

Year: 1966

Date modified: November 12, 2005

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