1985. Self, S. (Stephen), Smit, J. H. (Jacobus Hendrik), 1932-, and Stump, Edmund. Projection: Polar Stereographic Projection: Standard Parallels -80º14'; Series: USGS 1:250,000 Geologic Reconnaissance Series. United States Geological Survey.
1834. Owen, W. F. W., 1774-1857 and Stanford Geospatial Center. This layer is a georeferenced raster image of an historic regional map of Southern Africa originally created by W.F.W. Owen in 1834. The map contai... Stanford Digital Repository.
1793. Pisani, Almorò Alvise, 1754-1808 and Stanford Geospatial Center. This layer is a georeferenced raster image of an historic regional map of Southern Africa originally created by Almorò Alvise Pisani in 1793. This ... Stanford Digital Repository.