Hasan, MA. “Investigation on the Nitrogen Fixing Cyanobacteria (BGA) in Rice Fields of North-West Region of Bangladesh. I: Nonfilamentous”. Journal of Environmental Science and Natural Resources 5, no. 2 (April 29, 2013): 185–192. Accessed December 22, 2024. https://banglajol.info/index.php/JESNR/article/view/14812.