Three hundred important combinations by Dr. B.V.Raman is a great work which lists and explains the effects of most of the Rajayogas, many auspicious yogas, Rajayoga Bhangas and other bad yogas given in the varius Vedic Astrology scriptures. It is difficult to find one book where all these are listed and explained in one place. It is a must read book for those interested in learning Vedic Astrology.