1. Methods for determination of particle size distribution. Optical microscope method Part 4, (1st April 1984) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (72 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Light microscopes. Specification for surface marked graticules for eyepieces Part 8, (31st August 1990) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (4 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Light microscopes. Graticules for eyepieces Part 8, (15th March 1997) 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) ↗