"We are probably nearing the limit of all we can know about astronomy."
Simon Newcomb, astronomer ; 1888
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| Number | Title | Issue Date |
| 7150320 | Water treatment method for heavy oil production A process for treating produced water to generate high pressure steam. Produced water from heavy oil recovery operations is treated by first removing oil and grease. If necessary, the pH is then adjusted, normally downward, releasing at least some carbonate alkalini... | 12/19/2006 |