HASAN, S. N. EFFORTS TO INCREASE A BULLETS SHOT USING A PLASTIC BALL IN GRADE 10 STATE SENIOR HIGH SCHOOL 1 AMPEL, AMPEL, BOYOLALI IN THE YEAR OF 2016/2017. Journal Of Indonesia Sport Education and Adapted Physical Education (JISEAPE), v. 1, n. 1, 9 Feb. 2019.