Reference: Pittman 1961

Pittman, Richard S. 1961. The phonemes of Tetelcingo (Morelos) Nahuatl. In Benjamin F. Elson and Juan Comas (eds.), A William Cameron Townsend en el vigésimoquinto aniversario del Instituto Lingüístico de Verano, 643–51. Mexico: Instituto Lingüístico de Verano.

@incollection{pittman1961phonemes,
  address   = {Mexico},
  author    = {Pittman, Richard S.},
  booktitle = {A William Cameron Townsend en el vigésimoquinto aniversario del Instituto Lingüístico de Verano},
  editor    = {Benjamin F. Elson and Juan Comas},
  pages     = {643–51},
  publisher = {Instituto Lingüístico de Verano},
  title     = {The phonemes of Tetelcingo (Morelos) Nahuatl},
  year      = {1961}
}