Limited (search only) 1962
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Limited (search only) 1962-1967
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Limited (search only) 1963
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Limited (search only) 1965
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Limited (search only) 1966
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Limited (search only) 1967
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Limited (search only) 1967
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Limited (search only) 1968
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Limited (search only) 1968
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University of California
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Limited (search only) 1969
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University of California
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University of Michigan
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Limited (search only) 1970
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Limited (search only) 1971
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Limited (search only) 1971-74
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Limited (search only) 1972
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Limited (search only) 1973
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Limited (search only) 1974
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Limited (search only) 1974-1978
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University of Michigan
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Limited (search only) 1975
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Limited (search only) 1975-78
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Limited (search only) 1977
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University of Illinois at Urbana-Champaign
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Limited (search only) 1978
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Pennsylvania State University
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Limited (search only) 1979
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Limited (search only) 1979-82
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Limited (search only) 1981
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