Books, Encyclopedia, Almanac and other similar references
Articles published in professional journals, magazines, periodicals, newspapers and other publications
Manuscript, monographs, memoirs, speeches, letters and diaries
Unpublished thesis and dissertations
The constitution and laws and statues of the land
Bulletins, circulars and orders emanating from government offices and departments, especially from the Office of the President of the Philippines and Dep Ed
Records of schools, public and private, especially reports of their activities
Reports from seminars, educational or otherwise
Official reports of all kinds, educational, social, scientific, technological, political, etc. from the government and other entities
Movies and films