00562cam a22002291 4500 sa 68015204 DLC 20260227112641.0 940527m19679999ii 000 0 sino sa 68015204 PL480:C-486 (OCoLC)30507624 DLC CU CU DLC premarc HB180.S4 P45 Perera, B. C. (Bulathsinhalage Cyril), 1938- Ārthika vidyā lipi. [1967- v. 19 cm. In Sinhalese. Economics. 86305 86305