Botswana /
Great Britain.Directorate of Overseas Surveys.
[Tolworth, England] : The Directorate ; London : Edward Stanford Ltd. [distributor],
c1967.
"Based on Provisional mineral map of the Bechuanaland Protectorate, 1962. Additional information supplied by the Office of Her Majesty's Commissioner, Bechuanaland Protectorate, 1965."