Books by P. H. Royster:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Royster, P. H. (Percy Hoke), 1888-1966: Iron blast-furnace reactions (U.S. Dept. of Commerce, Bureau of Mines :, 1927), also by S. P. Kinney and T. L. Joseph (page images at HathiTrust)- Royster, P. H. (Percy Hoke), 1888-1966: Slag viscosity tables for blast-furnace work (U.S.Bureau of Mines, 1918), also by Alexander L. Feild and United States Bureau of Mines (page images at HathiTrust)
Find more by P. H. Royster at your library, or elsewhere.