Fayhaa Al-Bakkoa D, Al-Saegh B. Suggested Model of Developing an Internal Control System on Environmental Pollution Costs in the Northern Cement General Company. TANRA [Internet]. 2010 Jan. 1 [cited 2025 Sep. 10];32(97):156-81. Available from: https://edusj.uomosul.edu.iq/index.php/tanmiyat/article/view/30379