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Prof. Neil Martial Santillan of the UP Diliman Department of History gives a personal account of using extension output for a research work. (Photo by Bong Arboleda, UP MPRO)

Prof. Neil Martial Santillan of the UP Diliman Department of History gives a personal account of using extension output for a research work. (Photo by Bong Arboleda, UP MPRO)

Prof. Neil Martial Santillan of the UP Diliman Department of History gives a personal account of using extension output for a research work. (Photo by Bong Arboleda, UP MPRO)