Ssembatya, Jimmy Mukasa. Some factors contributing to teaching difficulties in modelling in s elected "O" level schools, Ssisa Sub-County, Wakiso District / Jimmy Mukasa Ssembatya. - Kampala, 2002. - ix,46 p. : ill., tabs, graphs, piecharts ; 30cm. Unpublished dissertation (B.Ed., Ext.) - Makerere University, 2002. Includes bibliographical references (p.43-46). Subjects--Topical Terms: Modeling.-------- Dewey Class. No.: 745.5928