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01 COAL
1
02 PETROLEUM
1
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; ANTARCTICA; MINERAL RESOURCES; PETROLEUM DEPOSITS; RESOURCE ASSESSMENT; PETROLEUM; RESERVES; ANTARCTIC REGIONS; ENERGY SOURCES; FOSSIL FUELS; FUELS; GEOLOGIC DEPOSITS; POLAR REGIONS; RESOURCES
29 ENERGY PLANNING
1
AND PEAT
1
LIGNITE
1
POLICY AND ECONOMY
1
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