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| Archive Reference / Library Class No. | NCB/C/SUR/3/8 |
| Former Reference | D4774/20/1/40-47 |
| Title | Plans of Threequarters Coal Seam in the North Derbyshire area, showing sulphur content, calorific value, chlorine and coal rank code |
| Date | Aug 1974 |
| Description | Comprising 4 plans with 4 tracings, revisions of Aug 1974. Produced by East Midlands Regional Geological Services. Scale 1:25000, various sizes |
| Extent | 1 outsize roll of 8 plans |
| Level | File |
| Repository | Derbyshire Record Office |
| Archive Creator | National Coal Board |
| Format | Map/Plan |