1
Published 2008
2
3
4
5
6
7
Published 2014
8
9
by Essed, 1955-
Published 1991
10
11
by Rubin
Published 2001
12
Published 1999
13
by Copeland
Published 1991
14
15
16
Published 1992
17
18
by Walliman
Published 2006
19
Published 1999
20
by Brewer
Published 1989