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| Title | Date | Type | ||
|---|---|---|---|---|
| 1 |
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Current activity in oil production from U.S. tar sands | 1979-06-12 | Text |
| 2 |
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Downhole hydraulic mining system | 1985-07-31 | Text |
| 3 |
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Naval petroleum and oil shale reserves | 1996 | Text |
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