“? 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 May 6, 2026. https://biostaging.pjsir.org/index.php/biological-sciences/article/view/2281.