Wyllie, Robert J.M.
European coal mining technology; new methods and systems developed by mines equipment manufacturers of western Europe - Englewood, CO Mining Media June 1986 - pp. 26-32
0095-8948
CARBON
MINERIA
EUROPA
European coal mining technology; new methods and systems developed by mines equipment manufacturers of western Europe - Englewood, CO Mining Media June 1986 - pp. 26-32
0095-8948
CARBON
MINERIA
EUROPA