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| Archive Reference / Library Class No. | D1851/P/7/BD24364-BD24699 |
| Former Reference | D1851/BOX/33 |
| Title | Technical drawings on microfiche. Numbers BD24364-BD24699 |
| Date | Apr 1969-Sep 1969 |
| Description | Arranged in chronological and "BD" reference order. Each microfiche has outer paper packaging which records the "BD" reference, another number (some starting with "R") and the date. Later drawings also have a descriptive title on the packaging. |
| Extent | 1 box |
| Level | File |
| Repository | Derbyshire Record Office |
| Archive Creator | Bryan Donkin & Co. Ltd of Chesterfield, Engineers |
| Format | Microfilm |