Muhammad AH, Helal AS. Effects of Occupational Exposure on Lung Function Tests in Old Process Plant Units workers, North Oil Company, Iraq. Journal of Petroleum Research and Studies [انترنت]. 1 يوليو، 2021 [وثق 9 نوفمبر، 2026];8(4):16-27. موجود في: https://jprs.gov.iq/index.php/jprs/article/view/260