https://books.google.com/books?id=m68BAAAAMAAJ& Harsha and His Times: A Glimpse of Political History During the Seventh Century A.D. , Page 78] by Bireshwar Nath Srivastava (Chowkhamba Sanskrit Series Office, 1976) It ruled an area of over 600000 sqmi , and the dynasty reigned a period of 143 years. [