//-->
Primary commodity price fluctuations and developing countries : an econometric model of copper and Zambia
Nziramasanga, Mudziviri T., (1981)
Domestic resource costs of investment projects in Zambiaʹs Second National Development Plan
Nziramasanga, Mudziviri T., (1974)
Incorporating commodity models into national models : a copper model
Sawyer, John A., (1979)