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Underground coal mine track inspection and cleaning vehicle /
by Richard L. Unger.

APA Citation

Unger, R. L. (1989). Underground coal mine track inspection and cleaning vehicle. Pgh [i.e. Pittsburgh] Pa.: U.S. Dept. of the Interior, Bureau of Mines.

MLA Citation

Unger, Richard L. Underground Coal Mine Track Inspection And Cleaning Vehicle. Pgh [i.e. Pittsburgh] Pa.: U.S. Dept. of the Interior, Bureau of Mines, 1989.

Warning: These citations may not always be complete (especially for serials).