Abduljabbar, I., اسماعیل, Sabah, A., احمد, Salih Mahmo, I. and ادهام . The Effect of Using balls of different weights and sizes on passing and shooting accuracy of juniors Football Players. Al-Rafidain Journal For Sport Sciences (RJSS). 17, 57 (), 183–199. DOI:https://doi.org/10.33899/rajsport.2011.163150.