1
Published 1997
2
3
by Buchanan, James M.
Published 2001
4
by McClelland
Published 1996
5
6
by Shapiro
Published 2003
7
8
9
Published 2006
10
Published 1999
11
by Ibn Khaldun
Published 1993
12
by Baradat
Published 1994
13
Published 1981
14
by Makmor Tumin
Published 2018
15
Published 2018
16
17
18
by Baradat, Leon P., 1940-
Published 1997
19
by White, Louise G.
Published 1983
20
by Buchanan, James M.
Published 2001