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Researches on colour-blindness : with a supplement on the danger attending the present system of railway and marine coloured signals / by George Wilson.

Colour-blindness and colour-perception / by F.W. Edridge-Green.

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Colour vision defects

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Researches on colour-blindness : with a supplement on the danger attending the present system of railway and marine coloured signals / by George Wilson.

Colour-blindness and colour-perception / by F.W. Edridge-Green.