SIMANJUNTAK, T. P.; SIJABAT, O. P.; SIJABAT, D. OPS Effect of the Use of Audio Visual Media on the Learning Outcomes of Class IV Students at Negeri 091299 Sipoldas. International Journal of Humanities, Management and Social Science (IJ-HuMaSS), v. 5, n. 2, p. 72-78, 21 Dec. 2022.