بجاي ا. Analyzing and measuring the joint costs of petroleum products and showing their impact on profits: Applied research in Aldora refinery. Entrepreneurship J Finance Bus [انترنت]. 25 أغسطس، 2025 [وثق 26 أغسطس، 2025];6(3):57-68. موجود في: https://nejfb.edu.iq/index.php/ejfb/article/view/532