- Institution of Chemical Engineers (Great Britain). North Western Branch (19)
- Gibson, N. (4)
- British Occupational Hygiene Society (1)
- Crump, P. R. (1)
- Holliday, L. (1)
- Institution of Chemical Engineers (Great Britain). Safety and Loss Prevention Group (1)
- Institution of Mechanical Engineers (Great Britain) (1)
- M.F.Pantony (1)
- Rottenburg, P. A. (1)
- Safety and Loss Prevention Group (1)
- Safety and Reliability Society (Great Britain) (1)