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| Archive Reference / Library Class No. | D1851/P/7/BD19700-20599 |
| Former Reference | D1851/BOX/31 |
| Title | Technical drawings on microfiche. Numbers BD19700-BD20599 |
| Date | Feb 1963-Jul 1963 |
| Description | Arranged in chronological and "BD" reference order. Each microfiche has outer paper packaging which records the "BD" reference, another number, descriptive title and the date. |
| Extent | 1 box |
| Level | File |
| Repository | Derbyshire Record Office |
| Archive Creator | Bryan Donkin & Co. Ltd of Chesterfield, Engineers |
| Format | Microfilm |