21
Published 1977
22
23
Published 1996
24
25
26
by Ramos-Horta, Jose
Published 2002
27
28
29
30
by Dureeti, H. Newhold, Dr.
Published 1992
31
by Meyer, Arnoud De, Prof.
Published 1996
32
Published 1990
33
Published 1989
34
35
Published 2009
36
37
by Meyer, Arnoud De, Prof.
Published 1996
38
Published 1998
39
Published 2007
40
Published 2008