The practice of absorption spectrophotometry with Hilger instruments : a guide to the technique of absorption measurement in the visible, ultra-violet, and infra-red regions of the spectrum / by F. Twyman ... with the collaboration of the staff and advisers of Adam Hilger, ltd.

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Twyman, F. (Frank), 1876-1959.

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The practice of absorption spectrophotometry with Hilger instruments : a guide to the technique of absorption measurement in the visible, ultra-violet, and infra-red regions of the spectrum / by F. Twyman ... with the collaboration of the staff and advisers of Adam Hilger, ltd.