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West African chiefs : Their changing status under colonial rule and independence. Ed. by Michael Crowder & Obaro Ikime. [Teilw.] transl. from the French by Brenda Packman
Crowder, Michael, (1970)
Congress and the President : Readings in executive-legislative relations
Travis, Walter Earl, (1967)
The Carter Presidency, and beyond : power and politics in the 1980s
Shoup, Laurence H., (1980)