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- Absorption spectra1
- Analytical chemistry1
- Bausch & Lomb Optical Company4
- Colorimetric analysis1
- Colorimetry5
- Colorimetry--Instruments6
- Colors1
- Duboscq, J. (Jules), 1817-18861
- Klett Manufacturing Company1
- Klett, Robert E.1
- Minneapolis-Honeywell Regulator Company1
- Photovolt Corporation1
- Spectrometer1
- Spectrophotometry1
- Spectroscope1
- Spectrum analysis2