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Oil and gas
Ion, C. D., (1990)
Natural gas : an internat. perspective
Mabro, Robert, (1986)
Oil & gas databook for developing countries : with special reference to the ACP countries
Fee, Derek, (1985)
Food import dependence in Somalia : magnitude, causes and policy options
Farzin, Yeganeh Hossein, (1988)
The relationship of external debt and growth : Sudan's experience, 1975 - 1984
Sustainability and Hamiltonian value
Farzin, Y. Hossein, (2002)