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Economic conditions
2
Economic history
2
General
2
�Ecologie humaine
1
�Etres humains
1
AFRICA
1
BUSINESS & ECONOMICS
1
Conditions �economiques
1
Conditions économiques
1
Conditions sociales
1
DESERTIFICATION
1
DEVELOPMENT
1
DEVELOPMENT PLANNING
1
ENVIRONMENT
1
Economics
1
Effect of human beings on
1
FOOD PROBLEMS
1
Human ecology
1
INDUSTRY
1
Influence sur la nature
1
Leadership
1
MAPS
1
Nature
1
Politics and government
1
Politique et gouvernement
1
Reference
1
SOCIAL SCIENCE
1
SOCIAL SCIENCE / Demography
1
STATISTICAL DATA
1
SUSTAINABLE DEVELOPMENT
1
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1
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2
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3