Ph ysico-chemical studies on the blending of lignosulphonate with wattle extract and syntans / T. M. Delowar Hossain. [MS Thesis] Hossain, T. M. Delowar Leather work 685 HOP Thesis (MS )-- Institute of Leather Engineering and Technology, University of Dhaka, session : 1980-81 Dhaka : University Of Dhaka, 1985. 1985. 1985 Text various in pagins : eng