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This study was supported by U. S. Office of Education Grant No. OEG 245033-042-010. I am deeply indebted to L. H. Hughes for his helpful guidance and advice.
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Chen, YW. Visual discrimination of color normals and color deficients. ECTJ 19, 417–431 (1971). https://doi.org/10.1007/BF02768366
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DOI: https://doi.org/10.1007/BF02768366