Corbett, Greville C. 2005a. Number of genders. In WALS, 126-29.
@incollection{corbett2005a,
author = {Corbett, Greville C},
booktitle = {WALS},
key = {Corbett 2005a},
pages = {126-29},
title = {Number of genders},
year = {2005a}
}