Shar, G. A., and G. A. Soomro. 2020. “SPECTROPHOTOMETRIC DETERMINATION OF COBALT(II), NICKEL(II) AND COPPER (II) WITH 1-(2 PYRIDYLAZO)-2-NAPHTHOL IN MICELLAR MEDIUM”. The Nucleus 41 (1-4):77-82. http://thenucleuspak.org.pk/index.php/Nucleus/article/view/1068.