Bioresource management : an ecological approach to manage some insect pest populations attacking duckweeds in pond ecosystem / Syeda Farhana Noor Chowdhury [PhD Thesis] Chowdhury, Syeda Farhana Noor Insects 595.7 CHB Thesis (Ph. D.) -- Department of Zoology, University of Dhaka, 2006-07. Includes bibliographical references Dhaka : University of Dhaka, 2010. 2010. 2010 Text xxix, 230 p. : eng