User talk:68.108.78.233

Meltzer, David J. First Peoples in the New World: You should remove any reference to this book since it is now agreed that there was a pre-clovis culture, and this book is totally based on there not being a pre-Clovis culture in the Americas. Look at https://en.wikipedia.org/wiki/Clovis_culture under "Clovis First/Single origin hypothesis"