Thick seam mining, problems and issues
ISTS '92, proceedings of the International Symposium 19-21 November 1992
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Singh, T.N. Dhar, B.B. Central Mining Research Station (Dhanbad, India)
ISTS '92, proceedings of the International Symposium 19-21 November 1992
Singh, T.N. Dhar, B.B. Central Mining Research Station (Dhanbad, India)