Austin, Texas : University of Texas, 1969

[Toronto] : University of Toronto Press, 1962

New York, Holt, Rinehart and Winston 1931

New York : Harcourt, Brace, 1959
[1st ed.].

Madison : University of Wisconsin Press, 1954

New York : C. Scribner's sons, 1921

New York : Harcourt, Brace and company, 1945
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Madison, University of Wisconsin Press, 1964

New York : C. Scribner's Sons, 1925

Cambridge : Harvard University Press, 1953