TY  - CPAPER
AU  - J. Butra
AU  - R. Debkowski
AU  - J Kudelko
AU  - J. Nowak
TI  - EXPLOITATION OF THICK COPPER ORE DEPOSITS BY DOUBLE- LAYER ROOM AND PILLAR METHOD
T2  - 6th International Scientific Conference - SGEM
PY  - 2006
SP  - 35
EP  - 42
PB  - SGEM Scientific GeoConference
ER  -