A reconnaissance trip through the eastern portion of the Bechuanaland Protectorate April 1931 and an expedition to Ngamiland june-july 1937
1948
Pole Evans, I. B. |
Pole Evans, I. B.
A vegetation map of South Africa
1936
Pole Evans, I. B. |
Roadside observations on the vegetation of East and Central Africa
1948
Pole Evans, I. B. |