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Color and its applications (1921)
Luckiesh, Matthew, 1883-1967 · New York, D. Van Nostrand company · leaf 71
Ultraviolet Visible … $4^ ^ s' — — UJ fra violet ^ Visible Q>\ Fig. 19. — -Ultra-violet spectra. 5iColor
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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