Books by R. O. Pynnonen:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Pynnonen, R. O. (Reino O.): An analysis of 44 recent fatal accidents with front-end loaders (Bureau of Mines, 1967), also by Allen D. Look (page images at HathiTrust)- Pynnonen, R. O. (Reino O.): Analysis of 494 accidents, open-pit iron-ore mines, beneficiation plants, and shops Lake Superior District (U.S. Dept. of the Interior, Bureau of Mines, 1959), also by A. D. Look and L. J. Zaverl (page images at HathiTrust)
- Pynnonen, R. O. (Reino O.): Central Mine Rescue Station, the Cleveland-Cliffs Iron Co. Mather Mine B Shaft, Negaunee, Mich. (U.S. Dept. of the Interior, Bureau of Mines, 1954), also by Roy G. Stott, John A. Johnson, and United States Bureau of Mines (page images at HathiTrust)
- Pynnonen, R. O. (Reino O.): Chemical solidification of soil in tunneling at a Minnesota iron-ore mine (U.S. Dept. of the Interior, Bureau of Mines, 1958), also by Allen D. Look (page images at HathiTrust)
Find more by R. O. Pynnonen at your library, or elsewhere.