CIA World Factbook 2006 (items marked * have been amended, see  for supporting documentation). Both this list and the CIA list may contain further errors. Despite the claim by the CIA that their list was updated in July 2006, none of the errors listed on the talk page have been corrected.
World Tops and Bottoms, by Grant Hutchison, 1996, TACit Press, ISBN 0-9522680-4-3, and subsequent research by the same author, in collaboration with field research by Ginge Fullen.
^ abcdeSome authorities give other elevations for these national high points. For more information, see the appropriate summit pages.
^Monalanong Hill is a mountain often considered the highest point of Botswana, with a questioned altitude of 1,494 metres (4,900 feet). This datum comes from the SRTM database just as the 1,491 m for Otse. The error range of these data is significantly higher (approximately 15 m), but a British explorer did a GPS reading on the top of both hills, and his measurement showed Otse slightly higher.
^Claims that Mont Iboundji is the highest point and more than 1500 metres high are not supported by SRTM data.