@book{37005,
	author = {Botha, Rudolf P.},
	title = {The prehistory of language},
	publisher = {Oxford University Press,},
	year = {2010.},
	series = {Studies in the evolution of language ;},
	address = {Oxford :},
	url = {http://dx.doi.org/10.1093/acprof:oso/9780199545872.001.0001}
}