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Siegel, Larry (University of Massachusetts, Lowell, Emeritus); Worrall, John (University of Texas at Dallas)
Siegel, Larry (University of Massachusetts, Lowell, Emeritus); Worrall, John (University of Texas at Dallas)
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Siegel, Larry (University of Massachusetts, Lowell, Emeritus); Worrall, John (University of Texas at Dallas)
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Siegel, Larry (University of Massachusetts, Lowell, Emeritus); Worrall, John (University of Texas at Dallas)
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Siegel, Larry (University of Massachusetts, Lowell, Emeritus); Worrall, John (University of Texas at Dallas)