a: travel and trade in the Indian Ocean. Longmans, Green, and Co. p. 62. සම්ප්‍රවේශය 28 September 2016.↑ Ansari, Azadeh (7 October 2009). "Oldest human skeleton offers new clues to evolution". CNN.com/technology. සම්ප්‍රවේශය 2 March 2011.↑ "Mother of man – 3.2 million years ago". Bbc.co.uk. සම්ප්‍රවේශය 16 March 2009.↑ Johanson, Donald C.; Wong, Kate (2010). Lucy's Legacy: The Quest for Human Origins. Crown Publishing Group. pp. 8–9. ISBN 978-0-307-39640-2.↑ "Institute of Human Origins: Lucy's Story". 15 June 2016. සම්ප්‍රවේශය 23 March 2017.↑ Mcdougall, I.; Brown, H.; Fleagle, G. (Feb 2005). "Stratigraphic placement and age of modern humans from Kibish, Ethiopia" (PDF). Nature. 433 (7027): 733–36. Bibcode:2005Natur.433..733M. doi:10.1038/nature03258. PMID 15716951. S2CID 1454595.↑ White, T.D.; Asfaw, B.; Degusta, D.; Gilbert, H.; Richards, G.D.; Suwa, G.; Clark Howell, F. (2003). "Pleistocene Homo sapiens from Middle Awash, Ethiopia". Nature. 423 (6941): 742–47. Bibcode:2003