Kibria, K., Islam, M. A. ., Hossain, M. Z. ., & Billah, S. M. . (2019). CALIBRATION OF YELLOW COLOUR SPECTROSCOPIC METHOD OF PHOSPHORUS DETERMINATION FOR WAVELENGTH, WORKING RANGE AND TIME. Khulna University Studies, 41–46. https://doi.org/10.53808/KUS.2019.16.1and2.1901-L