@article{CrossWendell2008,
  author    = {Charles Robert Cross and George Vincent Wendell},
  title     = {On some experiments with the phonograph, relating to the vowel theory of Helmholtz},
  journal   = {Proceedings of the American Academy of Arts and Sciences},
  volume    = {1892},
  pages     = {271 -- 279},
  year      = {2008},
}