Forts of Andhra Pradesh : ( from the earliest times upto 16th c. A.D.) - Ramachandra Murthy, N. S., 1943- (Bharatiya Kala Prakashan, 1996)
Originally presented as the author's thesis (Ph.D., Karnatak Univ., 1981) under the title: Forts and their importance in the history of Andhra from the earliest times up to 1600 A.D.