Ed. 1-D.O.S. 1976 / ed. 1 prepared by the Directorate of Overseas Surveys, 1975, from 1:50,000 series Z771 (D.O.S. 435) ; additional information supplied by the Surveyor-General, Swaziland, 1974.
Relief shown by gradient tints, contours, and spot heights. "Published for the Swaziland Government by the British Government's Ministry of Overseas Development (Directorate of Overseas Surveys) un der the Special Commonwealth African Assistance Plan." "Grid: South African Survey grid lo 31⁰." Includes boundary diagram and index map to 1:50,000 maps.