Kibria K, Islam MA, Hossain MZ, Billah SM. CALIBRATION OF YELLOW COLOUR SPECTROSCOPIC METHOD OF PHOSPHORUS DETERMINATION FOR WAVELENGTH, WORKING RANGE AND TIME. Khulna Univ. Stud. [Internet]. 2019 Dec. 28 [cited 2026 May 7];:41-6. Available from: http://kus.ku.ac.bd/kustudies/article/view/175