Islam, M.S., Mousume, N., Hossain, M.M., Aziz, M.A. and Islam, M.S. 2018. Theoretical Investigation of Non-Linear Optical (NLO) Properties and UV-Visible Spectra of N-(3, 5-dichlorobenzylidene)aniline and N-(3, 5- dichlorobenzylidene)4-nitroaniline. Dhaka University Journal of Science. 66, 2 (Jul. 2018), 139–143. DOI:https://doi.org/10.3329/dujs.v66i2.54559.