Marcel H, Tatiana M. Why Teachers Assign Socially Unequal Marks.: A Case for Establishing Tertiary Origin Effects in the Model of Primary and Secondary Effects of Educational Research. IJLTER [Internet]. 2018 Jul. 30 [cited 2026 Jun. 19];17(7):1-25. Available from: https://ijlter.myres.net/index.php/ijlter/article/view/654