| Views | |
| Applicability of Hilt's law to the Czech part of the Upper Silesian Coal Basin (Czech Republic) | 313 |
| November 2012 | December 2012 | January 2013 | February 2013 | March 2013 | April 2013 | May 2013 | |
| Applicability of Hilt's law to the Czech part of the Upper Silesian Coal Basin (Czech Republic) | 24 | 14 | 9 | 22 | 18 | 23 | 18 |
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