yaas M, Khalifa mohammed. Evaluation of National Standards for Exposure to Chemical Materials and Dusts in the State Company for Drugs Industry in Samarra. INJNS [Internet]. 2012 Sep. 30 [cited 2025 Jul. 29];25(2):9-16. Available from: https://www.injns.uobaghdad.edu.iq/index.php/INJNS/article/view/126