Al-Muhtady M. The Importance of Using the Barcode Mechanism in Increasing Proficiency Work in Selling Products" An Application Study in the Direct Sale Show in Mosul City university’. TANRA [Internet]. 2009 Mar. 1 [cited 2025 Sep. 10];31(93):246-77. Available from: https://edusj.uomosul.edu.iq/index.php/tanmiyat/article/view/29585