Faraj, M. G., and H. D. Omar. “The Effect of Substrate Temperature on the Structural Properties of Spray Pyrolysed Lead Sulphide (PbS) Thin Films”. ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY, Vol. 2, no. 2, Sept. 2014, pp. 11-14, doi:10.14500/aro.10044.