References
- Willard H. H., Merritt L. L., Jr., Dean J. A. Instrumental Methods of Analysis 4th edn. D. Van Nostrand Company, Inc. 1967
- Broughton P. M. G., Riley C. Scientific Report: Colorimeters with Flow Through Cells. 1965, (The Association of Clinical Biochemists)
- Edisbury J. R. Practical Hints on Absorption Spectrometry (Ultra-Violet and Visible). Hilger & Watts Ltd, London 1966