1
by Ziegler, David W.
Published 1984
2
Published 1998
3
by Burton, John W, 1915-
Published 1962
4
by Hauss, Charles
Published 1996
5
by Nixon, Richard M, 1913-
Published 1984
6
by Richmond, Oliver P.
Published 2008
7
8
9
10
11
by Pavlovsky, V.
Published 1977
12
13
by Galtung, Johan
Published 1989
14
by Mourin, Jennifer
Published 1994
15
by Galtung, Johan
Published 1996