Ibrahim H, Daham L. The Effect Of Learning According To Biorhythm Cycles (Mental & Physical) On The Development Of Some Basic Skills In Volleyball For Secondary School Female Students. jope [Internet]. 2018 Mar. 28 [cited 2024 May 3];30(1):150-61. Available from: https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/325