R, V., F. Kurniawan, and D. R. “EFFECT OF ADDING POLYVINYL ACETATE AND COCONUT SHELL ON CONCRETE”. IJTI International Journal of Transportation and Infrastructure EISSN 2597-4769 PISSN 2597-4734, Vol. 2, no. 2, Mar. 2019, pp. 98-04, doi:10.29138/ijti.v2i2.789.