References
- Harrison. Mitchener and Lawson J. Photo. Science, 3, 1955 pp.97-106.
- Harrison. To be published 1960 in the proceedings of the Harrogate Palra Off-set Conference.
- Jorgensen, Modern Lithography, 15, 45 (1947).
- Jorgensen & Bruno, L.T.F. Researeh Bull., No. 218.