Group by: Item Type | No Grouping Number of items: 1. Das, A.J. and Mandal, Prabhat Kumar and Ghosh, C.N. and Sinha, A. (2014) An Attempt to Develop A Technology for Extraction of Locked up Coal From Underground Mines Using Artificial Pillars. Indian Mining & Engineering Journal , 53 (5). pp. 18-25. ISSN 0019-5944 |