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Creator
- Adams, Edith 1
- Arnold, Frank H. 1
- Canada. Office of the Director of Civil Air Raid Precautions 1
- Church of England 1
- Electrical Research Laboratories 1
- Gordon & Belyea Limited 1
- Greenbank, Percy, 1878-1968 1
- Green, George, 1872-1955 1
- Hammerton, J. A. (John Alexander), 1871-1949 1
- Holst, Bernhart Paul, 1861- 8
- Johnson, Clifton, 1865-1940 1
- Johnston, Harry H. 1