1
2
by Spengler
Published 2002
3
by Wilson
Published 1937
4
by Boorstin
Published 1998
5
by Boorstin
Published 1993
6
7
8
9
by Winks
Published 1992
10
by Mumford
Published 2010
11
12
by Boorstin
Published 1983
13
by Hobson
Published 2004
14
by Husain
Published 1994
15
16
Published 1991
17
18
by Braudel
Published 1995
19
Published 1994
20