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Fesal Fesal, N., نبراس, Youns al murad, nibras and نبأ . The effect of using the round robin in learn the art of performing some volleyball skills and developing the tendency towards physical education for secondary students. Al-Rafidain Journal For Sport Sciences (RJSS). 25, 78 (), 78–92. DOI:https://doi.org/10.33899/rjss.2022.175451.