Amjadi, A., & Yeats, A. J. (1995). Have transport costs contributed to the relative decline of African exportsn: Some preliminary empirical evidence. World Bank, International Economics Department, International Trade Division.

Amjadi, Azita, and Alexander J. Yeats. Have Transport Costs Contributed to the Relative Decline of African Exportsn: Some Preliminary Empirical Evidence. Washington, D.C: World Bank, International Economics Department, International Trade Division, 1995.

Amjadi, Azita, and Alexander J. Yeats. Have Transport Costs Contributed to the Relative Decline of African Exportsn: Some Preliminary Empirical Evidence. World Bank, International Economics Department, International Trade Division, 1995.