Moayed A, Moayed G, Jawad M. The Effect of Group Investigation Model on Learning overhead and underarm Pass in Volleyball. jope [Internet]. 2019 Jun. 28 [cited 2026 Jul. 11];31(2):176-81. Available from: https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/926