Studies on the utilization of lignosulphonates : a paper mill waste black liquor as tanning agent (drum tanned sole leather) / Md. Anwar Hussain [MS Thesis] Hussain, Md. Anwar Tanning Leather 675.23 HUS Thesis (MS )—Department of Pharmacy, University of Dhaka, 1984. Includes bibliographical references. Dhaka : Bangladesh College of Leather Technology, University of Dhaka, 1985. 1985. 1985 Text iv, 36p. : eng