Social environment - Davies, George Reginald, 1876- (Chicago : A.C. McClurg, 1917)
"The statistical study which appears in the appendix and in chapter four was published in practically the same form in the Quarterly journal of the University of North Dakota, April, 1914. It is an abstract of a more extended study which was prepared as a doctor's thesis ... University of North Dakota."--Author's pref.
"General references": p. 145-146.
Keywords: Human beings -- Effect of environment on; Evolution; Sociology