Salgado, G. G. The National Power Corporation and the growth of Iligan as an industrial city in the South, 1936-1977. Selected papers of the Sixth National Conference on Local History, Quezon City, 11-14 December 1984, theme: Aspects of Philippine economic history / Leslie E. Bauzon, issue editor..

Salgado, Geoffrey G. "The National Power Corporation and the Growth of Iligan as an Industrial City in the South, 1936-1977." Selected Papers of the Sixth National Conference on Local History, Quezon City, 11-14 December 1984, Theme: Aspects of Philippine Economic History / Leslie E. Bauzon, Issue Editor. .

Salgado, Geoffrey G. "The National Power Corporation and the Growth of Iligan as an Industrial City in the South, 1936-1977." Selected Papers of the Sixth National Conference on Local History, Quezon City, 11-14 December 1984, Theme: Aspects of Philippine Economic History / Leslie E. Bauzon, Issue Editor., .