Books by John Kovac:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Kovac, John: Laboratory testing of compressed-oxygen self-rescuers for ruggedness and reliability (U.S. Dept. of the Interior, Bureau of Mines, 1983), also by John Shubilla, Wayne Duerr, and Nicholas Kyriazi (page images at HathiTrust)- Kovac, John: Laboratory testing of the CSE SR-100 self-contained self-rescuer for ruggedness and reliability (U.S. Dept. of the Interior, Bureau of Mines, 1990), also by John Shubilla, Wayne Duerr, and Nicholas Kyriazi (page images at HathiTrust)
- Kovac, John: Measuring noise from a continuous mining machine (United States Dept. of the Interior, Bureau of Mines, 1983), also by R. C. Bartholomae and Jack Robertson (page images at HathiTrust)
- Kovac, John: Measuring noise from a continuous mining machine (United States Dept. of the Interior, Bureau of Mines, 1983), also by R. C. Bartholomae and Jack Robertson (page images at HathiTrust)
Find more by John Kovac at your library, or elsewhere.