Tovias, Alfred The european communities' singal market : The challenge of 1992 for sub-sahan africa / Alfred Tovias - Washington : The World Bank , 1990 - 65. : ill. ; 30 cm. - World Bank Discussion paper No. 100 . ISBN: 0821316397 Subjects--Topical Terms: market challenge Gov. Doc. Class. No.: UN WB DP-100