01019cam a22002531 4500 gs 21000054 DLC 20260227111325.0 791108s1920 enkab 000 0 eng c gs 21000054 (OCoLC)5664986 Library, U.S. Geological Survey OCl DLC premarc TN808.G6 R7 Ronaldson, James Henry. Coal, by J. H. Ronaldson, with 12 maps and 2 diagrams. London, John Murray, 1920. ix, 1, 166 p. maps, tables. 22 cm. Great Britain. Imperial institute. Mineral resources committee. Monograph on mineral resources, with special reference to the British Empire Prepared under the direction of the Mineral resources committee of the Imperial institute, with the assistance of the scientific and technical staff. "References to literature on coal": p. 160-166. Coal. Imperial Institute (Great Britain) 26066 26066