Gregory, Theodor 1890- Ernest Oppenheimer and the economic development of Southern Africa/ Theodor Gregory. - Cape Town: Oxford University Press, 1962. - xx, 637 pages: illustrations. Includes bibliographical references. LCCN: 63000683 Subjects--Topical Terms: Diamonds.Oppenheimer, Ernest, Sir--1880-1957. Economic conditions--South Africa. LC Class. No.: ZAM HD9677 / .S62 GRE 1962.