Studies of Benthic Macro Fauna in fresh water ponds with special reference to oligochaet fauna / Mohammed Shahadat Ali [Ph.D. Thesis] Ali, Mohammed Shahadat Fish culture 639.311 ALS Thesis (Ph.D.)--Department of Zoology, University of Dhaka,1980 Includes bibliographical references Dhaka : University of Dhaka, 1980. 1980. 1980 Text xxvi, 320p. : eng