Utilizing mechanical linear transducers for the determination of a mining machine's position and heading : the concept /
by Christopher C. Jobes.
- Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1990.
- 16 p. : ill.
- Information circular ; 9254 .
- Information circular (United States. Bureau of Mines) ; 9254. .