1
Published 1987
2
Published 1982
3
Published 2001
4
Published 1985
5
Published 1987
6
Published 1978
7
Published 1985
8
Published 2002
9
Published 2002
10
Published 2006
11
Published 1993
12
Published 2001
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13
Published 2001
14
Published 2010
15
Published 2010
16
Published 2010
17
Published 2010
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Published 2007
19
Published 2007
20