Books by Jon A. Hummer:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Hummer, Jon A.: Effectiveness of selected diesel particulate matter control technologies for underground mining applications : isolated zone study, 2003 (U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, 2006), also by Shawn E. Vanderslice, Larry D. Patts, Steven E. Mischler, James D. Noll, George H. Schnakenberg, Aleksandar D. Bugarski, and Pittsburgh Research Laboratory (National Institute for Occupational Safety and Health) (page images at HathiTrust)- Hummer, Jon A.: Flywheel-powered shuttle car (U.S. Dept. of the Interior, Bureau of Mines, 1991), also by John R. Bartels and William D. Mayercheck (page images at HathiTrust)
Find more by Jon A. Hummer at your library, or elsewhere.