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Urbana, University of Illinois Press [1975]
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2.
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[Normal, Ill.] : Dalkey Archive Press, 2003.
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3.
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Minneapolis, MN : University of Minnesota Press, 1966.
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4.
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Minneapolis, University of Minnesota Press [1966]
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5.
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Minneapolis, MN : University of Minnesota Press, 1963.
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6.
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Minneapolis, University of Minnesota Press; [distributed to high schools in the U.S. by McGraw-Hill, New York, 1963]
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