Asiri, Abdullah Mohamed. “? SYNTHESIS AND ELECTRONIC ABSORPTION SPECTRA OF SOME Azo DYES AND THEIR ANALOGUES AZOMETHINES”. Biological Sciences - PJSIR 41, no. 5 (October 19, 1998): 242–243. Accessed November 22, 2024. https://v2.pjsir.org/index.php/biological-sciences/article/view/2281.