p w jeran

P. W. Jeran · U.S. Dept. of the Interior, Bureau of Mines

16 sayfa · 1983

Coal / Coal mines and mining / Geology / Ground control (Mining) / Safety measures

P. W. Jeran · U.S. Dept. of the Interior

10 sayfa · 1988

Longwall mining / Mine subsidences / Pennsylvania

P. W Jeran · Dept. of the Interior, Bureau of Mines

16 sayfa · 1977

Methane / Coal mines and mining / Mine ventilation / Measurement

P. W. Jeran · U.S. Bureau of Mines

34 sayfa · 1970

Coal mines and mining / Data processing

P. W. Jeran · U.S. Dept. of the Interior, Bureau of Mines

Sayfa sayısı yok · 1991

Environmental aspects of Longwall mining / Longwall mining / Mine subsidences

P. W Jeran · U.S. Dept. of the Interior, Bureau of Mines

10 sayfa · 1976

Mine gases / Methane

P. W Jeran · U.S. Dept. of the Interior, Bureau of Mines

17 sayfa · 1995

Environmental aspects / Environmental aspects of Longwall mining / Longwall mining / Mine subsidences