Abstract
'THE testing of colour-blindness in all its forms presents a problem of great practical importance involving the adoption of a definite technique.
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Collins, M. Tests in Common Use for the Diagnosis of Colour Defect*. Nature 140, 569–570 (1937). https://doi.org/10.1038/140569a0
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DOI: https://doi.org/10.1038/140569a0