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02 Petroleum
3
Petroleum
3
03 Natural Gas
2
Alaska
2
Availability
2
Climates
2
Distribution
2
Exploration
2
Information Systems
2
License Applications
2
Natural Gas
2
Production
2
04 Oil Shales And Tar Sands
1
30 Direct Energy Conversion
1
45 Military Technology
1
54 Environmental Sciences
1
And National Defense
1
Climate Models
1
Clouds
1
Compliance
1
Computers
1
Contractor Personnel
1
Contractors
1
Dimensions
1
Drilling
1
Efficiency
1
Evaluation
1
Fuel Cells
1
Geologic Surveys
1
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