Reference: Jacobs 1954

Jacobs, Melville. 1954. The areal spread of sound features in the languages north of California. University of California Publications in Linguistics 10. 46–56.

@article{jacobs1954areal,
  author  = {Jacobs, Melville},
  journal = {University of California Publications in Linguistics},
  pages   = {46–56},
  title   = {The areal spread of sound features in the languages north of California},
  volume  = {10},
  year    = {1954}
}