Full view
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Pennsylvania State University
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Full view 55.616:P 96/983
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Pennsylvania State University
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Full view 1983
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University of Illinois at Urbana-Champaign
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Full view 1987
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University of Illinois at Urbana-Champaign
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Full view 1989
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University of Illinois at Urbana-Champaign
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Full view 1989
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Columbia University
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Full view 1990
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University of Illinois at Urbana-Champaign
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Full view 1990
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Columbia University
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Full view 1991
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University of Illinois at Urbana-Champaign
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Full view 1991
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Columbia University
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Full view 1992
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University of Illinois at Urbana-Champaign
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Full view 1993
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University of Illinois at Urbana-Champaign
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Full view 1994
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University of Illinois at Urbana-Champaign
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