Biswas, J. K. “Role of Cyanobacteria on Rice Field Soil Fertility of Bangladesh : Qualitative and Quantitative Assessment of Cyanobacteria in Low Lying Rice Field”. Journal of the Asiatic Society of Bangladesh, Science, vol. 40, no. 1, July 2014, pp. 163-4, doi:10.3329/jasbs.v40i1.31744.