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Subject
- Europe—Maps11
- France—Maps11
- Germany—Maps11
- Great Britain—Maps11
- Italy—Maps11
- Post roads—Europe—Maps11
- Post roads—France—Maps11
- Post roads—Germany—Maps11
- Post roads—Great Britain—Maps11
- Post roads—Italy—Maps11
- Post roads—Spain—Maps11
- Spain—Maps11
- Natural gas6
- Power resources6
- Electric utilities4
- Electric power2
- Electric power transmission2
- Natural gas pipeline compressor stations2
- Natural gas pipelines2
- Biodiesel fuels1