African mining '91.
African Mining Conference(1991 :Harare, Zimbabwe)
Institution of Mining and Metallurgy (Great Britain)
London : Published for the Institution of Mining and Metallurgy by Elsevier Applied Science,
c1991.
"Papers presented at the 'African Mining '91' Conference, organized by the Institution of Mining and Metallurgy in association with the Zimbabwe Section of the Institution, the Geological Society of Zimbabwe and the Zimbabwe Institute of Engineers, and held in Harare, Zimbabwe, 10-12 June 1991."