• 18 Map Library (Robinson)

• 45 Population
• 31 Land use
• 21 Mines and mineral resources
• 15 Agriculture
• 12 Administrative and political divisions
• 9 Phytogeography
• 7 Ethnology
• 3 Indians of Central America
• 3 Migration, Internal
• 2 Distances, etc
• 2 E2
• 2 Economic conditions
• 1 Agricultural resources
• 1 Black people
• 1 Chemical industry
• 1 Crops
• 1 Electric power distribution
• 1 Ethnic groups
• 1 Ethnicity
• 1 Fishing
• 1 Fuel
• 1 Land capability for agriculture
• 1 Land use, Urban
• 1 Languages

• 47 English

• 3 Guatemala
• 2 China
• 2 El Salvador
• 2 France
• 2 Germany (East)
• 2 Homelands (South Africa)
• 2 Iran
• 2 Jamaica
• 2 Mexico
• 2 Poland
• 2 South Africa
• 1 Afghanistan
• 1 Algeria
• 1 Argentina
• 1 Austria
• 1 Berlin
• 1 Bhutan
• 1 Brunei
• 1 Colombia
• 1 Costa Rica
• 1 Denmark
• 1 Dominican Republic
• 1 French Guiana
• 1 Germany
• 1 Greece

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