Lad, Vasant, Dr., B.A.M.S., M.A.Sc., Textbook of Ayurveda: Fundamental Principles, Volume 1, Albuquerque, New Mexico: Ayurvedic Press, 2001, 335 Pages, ISBN-10: 1883725070. ISBN-13: 978-1883725075  (800-863-7721 or 505-291-9698) www.Ayurveda.com, http://www.amazon.com/gp/product/1883725070/ref=ase_medicinebuddh-20