1
2
by Carlson
Published 1998
3
by Dobbins
Published 2006
4
by Coonradt
Published 2007
5
by Hubbard
Published 2007
6
by Reinhold
Published 2001
7
by Hubbard, L. Ron
Published 2009
8
by Chaffin, Don B.
Published 2006