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Blue and Red Light, or, Light and its Rays as Medicine (1877)
The influence of the blue ray of the sunlight and of the blue color of the sky, in developing animal and vegetable life; in arresting disease and in restoring health in acute and chronic disorders to human and domestic animals, by A. J. Pleasonton; 1877; Philadelphia.
The First Books Ever Written on Blue and Red Light Therapy See Article here
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