1. Coal mining technology; theory and practice
Author: / by Robert Stefanko
Library: Library of Campus2 Colleges of Engineering of Tehran University (Tehran)
Subject: Coal mines and mining-- United states,Coal,Mines and mineral resources
Classification :
TN
805
.
S74
1983
2. Coal mining technology; theory and practice
Author: / by Robert Stefanko
Library: Tehran University, technical faculty libraries 1 (Tehran)
Subject: Coal mines and mining-- United states,Coal,Mines and mineral resources
Classification :
TN
805
.
S74
1983
3. Coal mining technology; theory and practice
Author: / by Robert Stefanko
Library: Library of Campus2 Colleges of Engineering of Tehran University (Tehran)
Subject: Coal mines and mining-- United states,Coal,Mines and mineral resources
Classification :
QD
516
.
S7
1982
