Books by Richard L. Unger:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Unger, Richard L.: Bureau of Mines research into reducing materials handling injuries (U.S. Dept. of the Interior, Bureau of Mines, 1986), also by T. G. Bobick (page images at HathiTrust)- Unger, Richard L.: Bureau of Mines research into reducing materials handling injuries (U.S. Dept. of the Interior, Bureau of Mines, 1986), also by T. G. Bobick and United States Bureau of Mines (page images at HathiTrust)
- Unger, Richard L.: Material handling devices for underground mines (U.S. Dept. of the Interior, Bureau of Mines, 1989), also by Ernest J. Conway (page images at HathiTrust)
- Unger, Richard L.: Reducing back injuries in low-coal mines : redesign of materials-handling tasks (U.S. Dept. of the Interior, Bureau of Mines, 1990), also by Sean Gallagher and T. G. Bobick (page images at HathiTrust)
- Unger, Richard L.: Reducing back injuries in low-coal mines : redesign of materials-handling tasks (U.S. Dept. of the Interior, Bureau of Mines, 1990), also by Sean Gallagher and T. G. Bobick (page images at HathiTrust)
- Unger, Richard L.: A Summary of current bureau research into the effects of whole-body vibration and shock on operators of underground mobile equipment (U.S. Dept. of the Interior, Bureau of Mines, 1992), also by Richard S. Fowkes, T. G. Bobick, and Arnold C. Love (page images at HathiTrust)
- Unger, Richard L.: Underground coal mine track inspection and cleaning vehicle (U.S. Dept. of the Interior, Bureau of Mines, 1989) (page images at HathiTrust)
Find more by Richard L. Unger at your library, or elsewhere.