y. Abdul- Hadi, Shimal, and شمال. 2025. “Effect of Different Amino Acids As Nitrogen Sources on Polysaccharide Production ( Pullulan ) By Aureobasidium Pullulans ATCC 42023”. Rafidain Journal of Science 19 (6):97-103. https://doi.org/10.33899/rjs.2008.41417.