^ abcGravrand, Henry: "La Civilisation Sereer – Pangool". Published by Les Nouvelles Editions Africaines du Senegal. 1990. pp, 9, 20 & 77. ISBN2-7236-1055-1.
From top to bottom: The first image is of the Senegambian stone circles (megaliths) which runs from Senegal all the way to The Gambia and described by UNESCO as "the largest concentration of stone circles seen anywhere in the world." It is believed that the site itself was an ancient burial ground. The second image is in (modern-day Mauritania) see West Saharan montane xeric woodlands. The third image is rock art in modern-day Mauritania. For all image references including the Tasili, see: Henry Gravrand. La Civilisation Sereer – Pangool. Published by Les Nouvelles Editions Africaines du Senegal. 1990. pp, 9, 20 & 77. ISBN2-7236-1055-1