Geography
Europe
Former Soviet republics
15 results
Russia (Federation)
9 results
Soviet Union
3 results
Asia, Central
2 results
Ukraine
2 results
Arab countries
1 results
European Union countries
1 results
North America
1 results
Norway
1 results
Pays de l'OCDE
1 results
Pays de l'Union européenne
1 results
United States
1 results
Urengoĭ Pipeline (Russia and Ukraine)
1 results