A proportional temperature controller with automatic shutoff /
by George M. Lucich and Philip W. Holland.
- Washington : U.S. Dept. of the Interior, Bureau of Mines, [1979]
- 8 p. : ill. ; 28 cm.
- Report of investigations - Bureau of Mines; 8423 .
- Report of investigations (United States. Bureau of Mines) ; 8423. .