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1by McCloy, Shelby T. (Shelby Thomas), 1898-1973“...Duke University publications....”
Published 1946
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2by Spengler, Joseph J. (Joseph John), 1902-1991“...Duke University publications....”
Published 1942
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3by Spengler, Joseph J. (Joseph John), 1902-1991“...Duke University publications....”
Published 1938
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