Blind pneumatic stowing in voids in abandoned mines /
Sands, Paul F.
Boldt, C. M. K.(Christine M. K.)
Ruff, T. M.
Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines,
1990.
Includes bibliographical references (p. 11-13).
Mine filling.
Compressed air.
Abandoned coal mines.