Ranveer Kumar, R. K. D. S. P. “Structural and Morphology Studies of PVP Polymer Blended With ZnSO4.7H2O Using XRD and SEM Characterization Techniques ”. Design Engineering, Aug. 2021, pp. 7016-20, http://thedesignengineering.com/index.php/DE/article/view/3219.