Books by P. J. Barrett:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Barrett, P. J. (Paul J.): Methods for producing alumina from clay : an evaluation of a sulfurous acid-sulfuric acid process (U.S. Dept. of Interior, Bureau of Mines, 1973), also by Frank A. Peters, Paul Watson Johnson, College Park Metallurgy Research Center (U.S.), and United States Bureau of Mines (page images at HathiTrust)- Barrett, P. J. (Paul J.): Sand bed dewatering of alumina miniplant tailings (U.S. Dept. of the Interior, Bureau of Mines, 1982), also by R. L. Rickel and D. M. Starrett (page images at HathiTrust)
Find more by P. J. Barrett at your library, or elsewhere.