Proceedings of the National Academy of Sciences of the United States of America, Vol. 13, No. 2 (Feb. 15, 1927), pp. 56-60 (5 pages) ...
Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. Photoelectric colorimetry was a hot topic in the mid-1930s when Arnoldus Goudsmit Jr. and William Henry Summerson ...
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