INVESTIGATION OF THE PRESENCE OF CHROMIUM (Cr) IN THE POULTRY FEED, CHICKEN MEAT AND EGG IN BANGLADESH USING LASER INDUCED BREAKDOWN SPECTROSCOPY TECHNIQUE: N. ASHRAFI, ISHTIAQUE. M. SYED, M. WAHADOSZAMEN. Bangladesh J. Phys. 2020;27(2):71-80. doi:10.3329/bjphy.v27i2.78394