1. Microfilming of technical drawings and other drawing office documents. Test procedures for diazo duplicating of microfilm images in aperture cards Part 5, (15th November 1999) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Punched cards. Unpunched paper cards Part 1, (23rd November 1970) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (18 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Specification for 35 mm microcopying of technical drawings. Unitized microfilm carriers Part 3, (30th December 1977) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗