Experimental longwall mining in a Pennsylvania anthracite mine : (in two parts) / by Robert J. Brennan, John W. Buch, and Edward R. Navrocky ; Pt. 1: Use of yielding steel props

Brennan, Robert J. / Buch, John W. / Navrocky, Edward R. | TIBKAT | 1964

Experimental Longwall mining in Pennsylvania anthracite mine -- 1

Brennan, R.J. / Buch, J.W. / Navrocky, E.R. | Engineering Index Backfile | 1964

Simultaneous cutter and loader for longwall mining

Young, T.E.B. / Sansom, W.H. | Engineering Index Backfile | 1946

Mine water problems of Pennsylvania anthracite region

Dierks, H.A. | Engineering Index Backfile | 1957

Mine pumping plants -- Anthracite region of Pennsylvania

Ash, S.H. / Hower, C.S. / Kennedy, D.O. et al. | Engineering Index Backfile | 1953