Report of investigations. 4997. Gasification of lignite in commercial-scale pilot plant, progress report Jan. 1, 1949-June 30, 1950 [with bibliography]; by A. C. Burr, R. C. Ellmau, J. J. Hoeppner, J. C. Holtz, T. W. Kamps, W. R. Kube, O. C. Ongstad, and W. H. Oppelt.

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