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(12 1975)
Provided by Northwestern University
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(no.13 yr.1978)
Provided by University of California
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(no.14 yr.1978)
Provided by University of California
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(no.15 yr.1979)
Provided by University of California
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(17 1980)
Provided by Northwestern University
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(no.18 yr.1983)
Provided by University of California
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(no.19 yr.1983)
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(20-22 1986)
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(no.20 yr.1986)
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(no.21 yr.1986)
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(no.22 yr.1986)
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(no.23 yr.1987)
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(no.24 yr.1987)
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(no.25 yr.1987)
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(26-27 1988)
Provided by Northwestern University
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(no.26 yr.1988)
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(no.27 yr.1988)
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(28/31 1989/1990)
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(no.28 yr.1989)
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(no.29 yr.1990)
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(no.30 yr.1990)
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(no.31 yr.1990)
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(no.32 yr.1990)
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(32 1990)
Provided by Northwestern University
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(33/34 1991)
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(no.34 yr.1991)
Provided by University of California
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(35/36 1992)
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(no.35 yr.1992)
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(no.36 yr.1992)
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(no.37 yr.1992)
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(no.38-40 yr.1992-93)
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(no.41-42 yr.1994)
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(no.43-44 yr.1994)
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(no.45 yr.1995)
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(no.46 yr.1995)
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(no.50 yr.1997)
Provided by University of California
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(no.55-56 yr.1999)
Provided by University of California
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(no.62 yr.2002)
Provided by University of California
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(no.63 yr.2002)
Provided by University of California
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(no.64-65 yr.2003)
Provided by University of California
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(no.66-67 yr.2003)
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(no.68 yr.2004)
Provided by University of California
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(no.70 yr.2006)
Provided by University of California
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(v.71 yr.2006)
Provided by University of California
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(no.73 yr.2009)
Provided by University of California