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Asset retirement obligations (Narrative) (Details)
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6 Months Ended |
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Apr. 30, 2013
Y
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| Asset Retirement Obligations 1 | 10.00% |
| Asset Retirement Obligations 2 | 12 |
| X | ||||||||||
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- Definition
Asset Retirement Obligations 2 No definition available.
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| X | ||||||||||
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- Definition
Asset Retirement Obligations 1 No definition available.
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