Ruwanpura, Thilak ජ්යාමිතියට පදනම = 9,10,11SHreeni sadhahaa jiyaamithiyata padhanama - Colombo: Sadeepa Prakashana, 1999. - 148p.; 21cm ISBN: 955-9374-52-4 Subjects--Topical Terms: GeometryMathematics Dewey Class. No.: 516 / RUW