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Washington,d.c. : The World Bank, 1991.
Third printing.
English | A 4(111:133) WOR VOL 2 | Available |
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[Geneva, Switzerland] : [World Intellectual Property Organization (WIPO)], 2009.
English | 10.34667/tind.28614 |
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Washington, D.C., U.S.A. : World Bank, c1991.
Third edition.
English | A 4(111:113) WOR VOL 1 | Available |