Keller, Kathryn C. 1959. The Phonemes of Chontal (Mayan). International Journal of American Linguistics 25. 44–53.
@article{keller1959,
author = {Keller, Kathryn C.},
journal = {International Journal of American Linguistics},
number = {1},
pages = {44–53},
title = {The Phonemes of Chontal (Mayan)},
volume = {25},
year = {1959}
}