De Gracia, E. , Casinillo, J. , Gamo, G. , Giente, J. , Handumon, J.A. and Bangalisan, LPT, MRIEdr., R. 2020. Effectiveness of Vacuum Eraser for Chalk Dust Removal. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research. 2, 1 (Apr. 2020).