1.
M. Alkawaz S. Estimate The Effect Of International Trade For Invironmental Services Sample From WTO Countries. TANRA [Internet]. 2018 Dec. 1 [cited 2025 Dec. 4];37(120):9-28. Available from: https://tanmiyat.uomosul.edu.iq/index.php/tanmiyat/article/view/29868