William C. Dement, Christopher C. Vaughan (2000). “The Promise of Sleep: A Pioneer in Sleep Medicine Explores the Vital Connection Between Health, Happiness, and a Good Night's Sleep”, Dell Books
William C. Dement, Christopher C. Vaughan (2000). “The Promise of Sleep: A Pioneer in Sleep Medicine Explores the Vital Connection Between Health, Happiness, and a Good Night's Sleep”, Dell Books