Abdul-Majeed Al-Khateeb, K., خالد, Oday Saeed Al-Dewachi, A.-R. and عبدالرحمن . Effectiveness of Using Both Slow and Ordinary Video Displaying on Learning the Technique of Performing Some Kinds of Smashing Strokes in Volleyball. Al-Rafidain Journal For Sport Sciences (RJSS). 20, 65 (), 236–254. DOI:https://doi.org/10.33899/rajsport.2014.89580.