925.    ---------------.  [FIELDNER, A. C., AND GOTTLIEB, S.]  Annual Report of Research and Technologic Work on Coal, Fiscal Year 1949.  Bureau of Mines Inf. Circ. 7565, 1950, 97 pp.

      This report, based largely upon publications issued during the fiscal year, summarizes research and technologic work of the Bureau of Mines on coal and coal products with continued emphasis on coking-coal reserves, conservation and mining safety, anthracite problems, and synthetic liquid fuels production.