Limited (search only) v.6(1988)
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University of Illinois at Urbana-Champaign
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University of Illinois at Urbana-Champaign
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Limited (search only) v.15(1997)
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University of Illinois at Urbana-Champaign
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Limited (search only) v.16(1998)
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University of Illinois at Urbana-Champaign
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University of Illinois at Urbana-Champaign
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University of Illinois at Urbana-Champaign
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Limited (search only) 1991
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University of California
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University of California
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University of California
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University of California
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University of Michigan
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University of Michigan
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University of California
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