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UNESCO Institute for Statistics
4
U.S. Geological Survey, Central Energy Resources Team
1
U.S. Geological Survey, Central Energy Resources Team, Douglas W. Steinshouer, Contractor to USGS, Denver, CO (comp.)
1
U.S. Geological Survey, Central Energy Resources Team, Mark J. Pawlewicz, USGS, Denver, CO (comp.), Angela J. Williams, Contractor to USGS, Menlo Park, CA (comp.), Susan M. Walden, Contractor to USGS, Denver, CO (comp.), Douglas W. Steinshouer, Contractor to USGS, Denver, CO (comp.)
1
U.S. Geological Survey, Central Energy Resources Team, Mark J. Pawlewicz, USGS, Denver, CO (comp.), Susan M. Walden, Contractor to USGS, Denver, CO (comp.), Douglas W. Steinshouer, Contractor to USGS, Denver, CO (comp.)
1
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Albania
9
Andorra
9
Austria
9
Belgium
9
Bosnia and Herzegovina
9
Bulgaria
9
Croatia
Afghanistan
5
Algeria
5
Angola
5
Antigua and Barbuda
5
Argentina
5
Armenia
5
Aruba
5
Australia
5
Azerbaijan
5
Bahamas
5
Bahrain
5
Bangladesh
5
Barbados
5
Belarus
5
Belize
5
Benin
5
Bermuda
5
Bhutan
5
Bolivia
5
Botswana
5
Brazil
5
Brunei Darussalam
5
Burkina Faso
5
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