Ahmed, Khaled, Zainha Al Jader, and Yousra Al-Rifai. 2012. “Bacterial Conjugation As a Method for Identifying the Locations of Genes Involved in Polysaccharide Polymerization in Bacillus Subtilis Bacteria”. Journal of Education and Science 25 (1):66-76. https://doi.org/10.33899/edusj.2012.58981.