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The challenge of Saudi Arabia : the regional setting and economic development as a result of the conquest of the Arabian Peninsula by King ʿAbdul ʿAziz Al Saʾud
Dequin, Horst, (1976)
Forecasting technology for planning decisions
Jones, Harry, (1978)
Togo 2000 : planification togolaise et voie africaine de développement
Dogo, Koudjolou M., (1983)
Leif Johansen : 1930 - 1982
Johansen, Leif, (2000)
Collected works of Leif Johansen
Johansen, Leif,
(1987). - XIII, 438 S.