වාණිජ අංක ගණිතය
Rajan, Dewa
වාණිජ අංක ගණිතය = wanija anka ganithaya - Colombo: Educational publications department, 1963. - 432p.; 21cm
Mathematics
513.93 / RAJ
වාණිජ අංක ගණිතය = wanija anka ganithaya - Colombo: Educational publications department, 1963. - 432p.; 21cm
Mathematics
513.93 / RAJ