Bickerton, Derek. 1981. Roots of language. Ann Arbor: Karoma.
@book{145,
address = {Ann Arbor},
author = {Bickerton, Derek},
booktitle = {Roots of language},
key = {Bickerton 1981},
publisher = {Karoma},
title = {Roots of language},
type = {Bibliographical record},
url = {https://books.google.de/books?id=rthrAAAAIAAJ},
year = {1981}
}