Regionalism reconsidered : the Economic Commission for Africa / Isebill V. Gruhn. Gruhn, Isebill V. United Nations. Economic Commission for Africa. Regionalism Africa. HC502 .G78 338.96 GRR Includes index. Bibliography: p. 148-151. Boulder, Colo. : Westview Press, 1979. 1979. 1979 Text xiv, 154 p. ; eng Westview special studies on Africa Africa Economic integration. Africa.