Cataloguing the World's Endangered LanguagesLyle Campbell, Anna Belew, Endangered Languages Project (Website) Staff · First published 2018Open the Tome
The indigenous languages of South AmericaLyle Campbell, Verónica María Grondona · First published 2012Open the Tome
Glossary of Historical LinguisticsLyle Campbell, Mauricio J. Mixco · First published 2007Open the Tome
The Foreign impact on lowland Mayan language and scriptJohn S. Justeson, William M. Norman, Terrence Kaufman, Lyle Campbell · First published 1985Open the Tome
