الموضوعات المستخلصة من بحثك.
الموضوعات المستخلصة من بحثك.
Energy industries
Energy policy
19
Power resources
19
Petroleum industry and trade
10
Environmental aspects
8
Energy conservation
7
Energy development
7
Renewable energy sources
6
Technological innovations
6
Congresses
5
Energy consumption
5
Mineral industries
5
Statistics
5
Environmental policy
4
Research
4
Directories
3
Employees
3
Finance
3
Foreign relations
3
Health aspects
3
Political aspects
3
Economic aspects
2
Economic conditions
2
Mathematical models
2
Periodicals
2
Planning
2
Safety measures
2
Social aspects
2
World politics
2
Accidents
1
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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12
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13
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14
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15
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16وقائع المؤتمر كتابمنشور في 1987
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17
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18
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19
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20