Egan, Margaret R.
Coal combustion in a ventilated tunnel Egan, Margaret R. - Washington Bureau of mines 1987
MINERIA
COMBUSTION DE CARBON
MINAS DE CARBON
622.81
Coal combustion in a ventilated tunnel Egan, Margaret R. - Washington Bureau of mines 1987
MINERIA
COMBUSTION DE CARBON
MINAS DE CARBON
622.81