1
by Hubbard
Published 2008
2
Published 2013
3
Published 2006
4
Published 2008
5
Published 1998
6
by Hubbard
Published 2005
7
by Fleckenstein, William A.
Published 2008
8
by Hubbard, R. Glenn
Published 2014
9
by Hubbard, R. Glenn
Published 2017
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