| · | Agencia de Medio Ambiente | · | Country Profile, CIA World Factbook |
| · | Country Profile, WTPF | · | Customs Administration |
| · | Development Projects, AiDA | · | Energy Efficiency Institutions, WEEA |
| · | Environmental Institutions & Governance, WRI | · | Environmental Profile, UNEP |
| · | Industrial Profile, UNIDO | · | International Chamber of Commerce |
| · | Legislation, Library of Congress | · | Market Profile, UNCTAD/WTO |
| · | Ministerio de Ciencia, Tecnología y Medio Ambiente | · | Population Statistics, UNICEF |
| · | Sustainable Development, UN-ESA | · | Weather Information Service (WMO) |
