Five years that shook the world
Westview Press, 1991
 Buku Teks
The Science of man in the world crisis
0, 0
 Buku Teks
World Population Trend and Policies
0, 1980
 Buku Teks
Five years that shook the world
 Buku Teks
Five years that shook the world
 Buku Teks
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