Yellen, John E. (1998). “Barbed Bone Points: Tradition and Continuity in Saharan and Sub-Saharan Africa”. 《African Archaeological Review》 15 (3): 173–198. doi:10.1023/A:1021659928822. S2CID128432105.
Yellen, John E. (1998). “Barbed Bone Points: Tradition and Continuity in Saharan and Sub-Saharan Africa”. 《African Archaeological Review》 15 (3): 173–198. doi:10.1023/A:1021659928822. S2CID128432105.