TY - JOUR L1 - http://www.journals.pan.pl/Content/105553/PDF/10267-Volume61_Issue4-10_paper.pdf L2 - http://www.journals.pan.pl/Content/105553 PY - 2016 IS - No 4 DO - 10.1515/amsc-2016-0058 A1 - Krawczyk, Piotr A1 - Majer, Marzena A1 - KrzemieĊ„, Joanna PB - Committee of Mining PAS DA - 2016 T1 - Proposal of Economic Assessment of Hard Coal Mines Operation Conducted in Polish Conditions with the Use of Cost Benefit Analysis UR - http://www.journals.pan.pl/dlibra/publication/edition/105553 T2 - Archives of Mining Sciences ER -