Seasonal variation of water quality and nutrient contents of Wallago attu (Bloch & Schneider, 1801) in different freshwater habitats of Bangladesh / Md. Sakhawat Hussain. [MS Thesis] Hussain, Md. Sakhawat 23 597.482 HUS Thesis (MS )--Department of Fisheries, University of Dhaka, Session: 2014-2015. Includes bibliographical references. Dhaka : University of Dhaka, 2015. 2015. 2015 Text [3], xi, 84 p. : eng