J. G. Simpson

• The geology and groundwater resources of the Lusaka area
• The alluvial gold of the Msidza River, Lundazi District
• The geology of the Chinyunu area
• The geology of the Mwembeshi River area
• The Nchoncho bismuth prospect, Central Province
• The Njoka graphite deposit, Lundazi district
• Two talc deposits near Lusaka