Frequency and the emergence of linguistic structure / ed. by Joan Bybee, Paul HopperLinguistic diversity and language theories / ed. by Zygmunt Frajzyngier, Adam Hodges, David S. RoodLinguistic diversity and language theories / ed. by Zygmunt Frajzyngier, Adam Hodges, David S. RoodLanguage structure and environment : social, cultural, and natural factors / edited by Rik De Busser, Randy J. LaPolla