1. Breathing apparatus. Fresh air hose and compressed air line breathing apparatus Part 3, (7th June 1974) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Specification for breathing apparatus. Closed-circuit breathing apparatus Part 1, (1st September 1974) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗