In 1938 the British Colour Council issued (in collaboration with the Royal Horticultural Society) the first volume of a Horticultural Colour Chart, also called The Wilson Colour Chart after Robert F. Wilson, the...
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In 1938 the British Colour Council issued (in collaboration with the Royal Horticultural Society) the first volume of a Horticultural Colour Chart, also called The Wilson Colour Chart after Robert F. Wilson, the...
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