The Gaborone Granite, Kanye Volcanics and Ventersdorp Plantation Porphyry, Botswana geochronology and review
Harding, Roger Robertson.
Crockett, Richard Nicholas.
Snelling, N. J.
London H.M.S.O.
1974
English, French and German summary
Bibliography: p.20-21
Geology
Granite