India. Hughes, T.W.H. (1877). ‘Borings for Coal in India’, extract of The Records of the Geological Survey of India, engineering geology Guide to the Geology of

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India. Hughes, T.W.H. (1877). ‘Borings for Coal in India’, extract of The Records of the Geological Survey of India, engineering geology Guide to the Geology ofIndia. Hughes, T. W. H. (1877). Borings for Coal in India, extract of The Records of the Geological Survey of India, vol. X, pt. 2, pp. 92 97, + 1 foldout hand coloured map, Geological Sketch of the Aravali Series in North East Rajputana, scale 1=16 miles 1: 506,880, 31x 37 cm. text and map age toned but clean. In good condition.