1
2
by Tvedt, Terje
Published 1998
3
by Nolan, Riall W.
Published 1986
4
5
6
by Zisk, Betty H.
Published 1987
7
by Wan, Henry Y
Published 2006
8
by Ramesh, M.
Published 2000
9
10
11
12
Published 1988
13
Published 2004
14
by Gurharpal Singh
Published 2000
15
Published 1999
16
Published 1999