Maddieson, Ian. 2005c. Presence of uncommon consonants. In WALS, 82-85.
@incollection{maddieson2005c,
author = {Maddieson, Ian},
booktitle = {WALS},
key = {Maddieson 2005c},
pages = {82-85},
title = {Presence of uncommon consonants},
year = {2005c}
}