Reprint from Human Biology, May 1934, Vol. 6, No. 2, pp. 324-354. © Wayne State University Press, 1934
Wilson, Paul Thomas
"A Study of Twins with Special Reference to Heredity as a Factor Determining Differences in Environment,"
5, Article 5.
Available at: https://digitalcommons.wayne.edu/humbiol/vol61/iss5/5