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| lack asphalt; natural rock asphalt; lake asphalt; natural bitumen; asphaltum; lake pitch | |||
| bitumen and asphalt, natural | |||
| natural asphalt | |||
| asphalt; asphaltite; gilsonite; lake asphalt (aus einem Asphaltsee); lake pitch (aus einem Asphaltsee); mineral pitch; native asphalt; rock asphalt | |||
| Naturasphalt: 3 phrases in 2 subjects |
| Construction | 2 |
| Mining | 1 |