Contour Plan of the Trencherbone Seam and Ashton Black Mine, South Lancashire Coalfield (with explanatory pamphlet). By G. Hickling, D.Sc, F.G.S. Scale 2 inches to 1 mile. Size of map about 5 ft. 6 in. × 2 ft. 6 in. Published by the Lancashire and Cheshire Coal Association, 1924.
Geological Magazine · 1925
Contour Plan of the Trencherbone Seam and Ashton Black Mine, South Lancashire Coalfield (with explanatory pamphlet). By G. Hickling, D.Sc, F.G.S. Scale 2 inches to 1 mile. Size of map about 5 ft. 6 in. × 2 ft. 6 in. Published by the Lancashire and Cheshire Coal Association, 1924. - Volume 62 Issue 7