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| Archive Reference / Library Class No. | NCB/A/BOL/13/6 |
| Former Reference | N40/5/6 |
| Title | Bolsover Colliery Deep Hard Seam plan of support rules plan for hand filled places, in accordance with the Coal Mines (Support of Roof and Sides) Regulations 1947 |
| Date | [mid 20th cent] |
| Description | Scale 4 feet to 1 inch. With sections |
| Extent | 1 outsize item |
| Level | Item |
| Repository | Derbyshire Record Office |
| Archive Creator | Bolsover Colliery Company Ltd |
| National Coal Board |
| Format | Map/Plan |
| Dimensions | 106cm x 66cm |