Hakim, H., Hashim, A., Abdul-Hafidh, G., Alyaa, .H.A, & Mohammed, S. (2014). STUDY THE OPTICAL PROPERTIES OF POLYVINYLPYRROLIDONE (PVP) DOPED WITH KBr. European Scientific Journal, ESJ, 9(10). https://doi.org/10.19044/esj.2013.v9n10p%p