Blair, E. H., Robertson, J. A., & Bourne, E. G. (1973). The Philippine islands, 1493-1898: Explorations by early navigators, descriptions of the islands and their peoples, their history and records of the Catholic missions, as related in contemporaneous books and manuscripts, showing the political, economic, commercial and religious conditions of those islands from their earliest relations with European nations to the beginning of the nineteenth century. Cacho Hermanos.

Blair, Emma Helen,1851-1911, James Alexander,1873-1939 Robertson, and Edward Gaylord Bourne. The Philippine Islands, 1493-1898: Explorations by Early Navigators, Descriptions of the Islands and Their Peoples, Their History and Records of the Catholic Missions, as Related in Contemporaneous Books and Manuscripts, Showing the Political, Economic, Commercial and Religious Conditions of Those Islands from Their Earliest Relations with European Nations to the Beginning of the Nineteenth Century. Mandaluyong, Rizal: Cacho Hermanos, 1973.

Blair, Emma Helen,1851-1911, et al. The Philippine Islands, 1493-1898: Explorations by Early Navigators, Descriptions of the Islands and Their Peoples, Their History and Records of the Catholic Missions, as Related in Contemporaneous Books and Manuscripts, Showing the Political, Economic, Commercial and Religious Conditions of Those Islands from Their Earliest Relations with European Nations to the Beginning of the Nineteenth Century. Cacho Hermanos, 1973.