Subject
Mineral industries
19
Mines and mineral resources
18
Oil fields
13
Traffic accidents
9
Coal mines and mining
6
Drinking and traffic accidents
6
Petroleum industry and trade
6
Sampling (Statistics)
5
Secondary recovery of oil
5
Water quality
5
Distribution (Probability theory)
4
Fuel
4
Natural gas
4
Drunk driving
3
Energy consumption
3
Manufactures
3
Motorcycling accidents
3
Petroleum refineries
3
Transportation
3
Water Pollution Research
3
Water-supply
3
Coal-fired power plants
2
Dams
2
Nutrition surveys
2
Pedestrian accidents
2
Petroleum Prospecting
2
Petroleum reserves
2
Power-plants
2
Probabilities
2
Stream measurements
2
Unit operation of oil fields
2
Abandoned mines
1
Acquisition of property
1
Aeronautical engineers Employment
1
Aerospace engineers Employment
1
Aircraft accidents
1
Aircraft bird strikes
1
Airplanes Fuel
1
Analytical geochemistry
1
Anthracite coal
1
Astronautics
1
Automobile industry and trade
1
Automobiles Fuel consumption
1
Bituminous coal
1
Buildings Energy consumption
1
Coal Geology
1
Coal mine waste Recycling
1
Coal mines and mining Fires and fire prevention
1
Coal trade
1
Coke industry
1
more ...