عبد الرحمن حنضل زين العابدين and Ajil, A. 2023. Planning exercises with a device designed on some biomechanical and skill variables in futsal for ages under (19 years) . Wasit Journal of Sports Sciences. 16, 3 (Aug. 2023), 534–553. DOI:https://doi.org/10.31185/wjoss.364.