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Journal of the Southern African Institute of Mining and Metallurgy
On-line version ISSN 2411-9717Print version ISSN 2225-6253

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LIU, X.; SONG, G.  and  LI, X.. Classification of roof strata and calculation of powered support loads in shallow coal seams of China. J. S. Afr. Inst. Min. Metall. [online]. 2015, vol.115, n.11, pp.1113-1119. ISSN 2411-9717.


 


 

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