Optical studies of SHI Irradiated poly(o-toluidine)-PVC blends G. B.V.S. Lakshmi, V. Ali, A. M. Siddiqui, P. K. Kulriya and M. Zulfequar Eur. Phys. J. Appl. Phys., 39 3 (2007) 251-255 Published online: 08 August 2007 DOI: 10.1051/epjap:2007121