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Karl Ryberg
In this groundbreaking guide to maximizing the restorative and regenerative benefits of light, psychologist Karl Ryberg explains how to use different types of light--sun, fire, and even artificial lig
184,95 kr.
Karl Ryberg
Learn how to use light to boost your mood and wellbeing, create a happier, healthier home and enhance your life. The light that surrounds on a daily basis us has a huge impact on our brains, our mood
119,95 kr.