1. Air filters used in air conditioning and general ventilation. Methods of test for atmospheric dust spot efficiency and synthetic dust weight arrestance Part 1, (29th March 1985) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (32 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Specification for pipeline filters, filter bodies and filter elements for milking installations. (31st January 1985) 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) ↗