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| btu-20240502.htm | 29784 | 2024-05-02 08:00:25 |
| btu-20240502.xsd | 1929 | 2024-05-02 08:00:25 |
| btu-20240502_htm.xml | 2720 | 2024-05-02 08:00:25 |
| btu-20240502_lab.xml | 21885 | 2024-05-02 08:00:25 |
| btu-20240502_pre.xml | 12531 | 2024-05-02 08:00:25 |
| btu8k20240502ex991.htm | 371530 | 2024-05-02 08:00:25 |
| btu8k20240502ex992.htm | 6579 | 2024-05-02 08:00:25 |
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