• 4 Maps, Atlases

• 4 Population
• 2 Industries
• 2 Land use
• 1 Agriculture
• 1 Chemical industries
• 1 E2
• 1 Economic conditions
• 1 Electric power distribution
• 1 Ethnology
• 1 Machinery industry
• 1 Metal-work
• 1 Metallurgy
• 1 Oil fields
• 1 Petroleum refineries
• 1 Phytogeography
• 1 Tribes

• 4 United States. Central Intelligence Agency

• 4 English

• 1 Japan
• 1 Maps and atlases
• 1 Mexico
• 1 Persian Gulf Region
• 1 Saudi Arabia
• 1 Soviet Union

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