Weerakoon, Dushni How open has the Sri Lankan economy become? : trends in trade and trade taxes : 1977-93 / by Weerakoon, Dushni ; White, Howard - Colombo Institute of policy studies 1995 - [4], 21p. 29 cm. - microeconomics 9 . SLC ISBN: 9559122444 Dewey Class. No.: 339.5 / WEE