Pre-feasibility study Lumban-Caliraya-Lumot-Cavinti road [microform]

Pre-feasibility study Marikina-Infanta road [microform]

Pre-feasibility study of 1, 115 kilometersof project roads in Luzon, Visayas and Mindanao [microform]

Pre-feasibility study of Carmen Jet-DAPECOL-Manay-Pnabo-Cagangohan pier road [microform]

Pre-feasibility study [of] Bataan superhighway (Layac Jct.-Mariveles road).

Project report three interchanges along E. de los Santos Avenue, Metropolitan Manila.

Pre-feasibility study of Carmen Jct-DAPECOL-Manay-Panabo-Cagangohan pier road