Some aspects of socio-economic condition and fish culture practice of the fish farmers in Tangail Sadar Upazila / [MS Thesis] Fish culture 639.3 SOM Thesis (M. Sc.) -- Department of Zoology, University of Dhaka, 2006-2007 Includes bibliographical references Dhaka : University of Dhaka, 2009. 2009. 2009 Text xiii, 84 p. : eng