1. Geometrical product specifications (GPS). Length standards. Gauge blocks. (15th May 1999) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (26 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Optical fibres. Polarization mode dispersion measurement techniques for single-mode optical fibres. (15th November 1999) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (46 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗