Full view v.17(1970)
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University of Illinois at Urbana-Champaign
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Full view v.20(1973)
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University of Illinois at Urbana-Champaign
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Limited (search only) v.21-22 yr.1974-75
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University of California
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Limited (search only) v.21(1974)
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University of Illinois at Urbana-Champaign
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Limited (search only) v.29-30(1982-1983)
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University of Illinois at Urbana-Champaign
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Limited (search only) v.30 1983
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University of Colorado Boulder
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Limited (search only) v.32-34(1985-1987)
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University of Illinois at Urbana-Champaign
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Limited (search only) v.34 1987
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University of Colorado Boulder
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Limited (search only) v.37-38 (1990-91)
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University of California
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Limited (search only) v.41-42(1994-1995)
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University of Illinois at Urbana-Champaign
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Limited (search only) v.51(2004)
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University of Illinois at Urbana-Champaign
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