Books by Lawrence K. Barker:
Books in the extended shelves:
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Barker, Lawrence K.: Producing SNG by hydrogasifying in situ crude shale oil (U.S. Bureau of Mines, 1975), also by University of Wyoming (page images at HathiTrust)- Barker, Lawrence K.: Refining improvement of shale-oil naphtha (U.S. Dept. of Interior, Bureau of Mines, 1973), also by P. L. Cottingham and University of Wyoming (page images at HathiTrust)
Find more by Lawrence K. Barker at your library, or elsewhere.