Yazar
g j chekan
10 cilt bulundu.
G. J. Chekan · U.S. Dept. of the Interior, Bureau of Mines
14 sayfa · 1990
Boone County / Case studies / Environmental aspect / Environmental aspects of Longwall mining / Environmental aspects of Pillaring (Mining)
G. J. Chekan · Dept. of the Interior
15 sayfa · 1989
Dickenson County / Longwall mining / Mine subsidences / Virginia
G. J. Chekan · U.S. Dept. of the Interior, Bureau of Mines
14 sayfa · 1992
ALPS (Computer file) / Computer simulation / Gate roads (Mining) / Ground control (Mining) / Longwall mining
G. J. Chekan · U.S. Dept. of the Interior, Bureau of Mines
35 sayfa · 1993
Ground control (Mining) / Longwall mining
G. J. Chekan · U.S. Dept. of the Interior, Bureau of Mines
Sayfa sayısı yok · 1982
Caving mining / Coal mines and mining / Gate roads (Mining) / Mine roof control / Safety measures
G. J. Chekan · U.S. Dept. of the Interior, Bureau of Mines
19 sayfa · 1988
Coal mines and mining / Mine subsidences / Pillaring (Mining)
G. J. Chekan · U.S. Dept. of the Interior, Bureau of Mines
17 sayfa · 1986
Coal mines and mining / Ground control (Mining) / Mine subsidences / Pillaring (Mining)
G. J. Chekan · U.S. Dept. of the Interior, Bureau of Mines
Sayfa sayısı yok · 1982
Caving mining / Coal mines and mining / Ground control (Mining) / Safety measures
G. J. Chekan, Jeffrey M. Listak · United States Dept of Interior
Sayfa sayısı yok · 1994
Islamic ethics / Early works to 1800 / Religious life / Islam