Princess Urduja, Queen of the Orient Seas before and after her time in the political orbit of the Shri-vi-ja-ya and Madjapahit maritime empire a pre-Hispanic history of the Philippines - Del Castilo, Antonio Tuazon 1908- (Lingayen, Pangasinan A. del Castillo y Tuazon, 1988., 1988)
Keywords: Philippines -- History -- to 1521.