Nguyen Thi Huong. “DERTERMINING TOTAL AMOUNT OF ZINC IN ARGRICULTURAL SOIL IN SOME AREAS OF DANANG CITY ”. UED Journal of Social Sciences, Humanities and Education 2, no. 2 (June 21, 2012): 21-26. Accessed May 18, 2021. https://jshe.ued.udn.vn/index.php/jshe/article/view/385.