Development working in residual abutment pressure zones in thick steep seams
| Autor: | Gritsko, G. I., Posokhov, G. F., Tsytsarkin, V. N. |
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| Zdroj: | Journal of Mining Science; May 1966, Vol. 2 Issue: 3 p259-261, 3p |
| Databáze: | Supplemental Index |
| Externí odkaz: |
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