15:3215:32, 9 June 2015diffhist+180
Lebombo bone
Bushmen in Namibia today continue to use calendar sticks that are similar to the Lebombo bone.<ref>''501 Things YOU Should Have Learned About...Math'' (Metro Books, 2014), p. 47</ref>
15:3215:32, 9 June 2015diffhist+180
Lebombo bone
Bushmen in Namibia today continue to use calendar sticks that are similar to the Lebombo bone.<ref>''501 Things YOU Should Have Learned About...Math'' (Metro Books, 2014), p. 47</ref>