@article{Swadesh1955,
    journal = {International Journal of American Linguistics},
    author = {Swadesh, Morris},
    number = {2},
    volume = {21},
    title = {Towards greater accuracy in lexicostatistic dating},
    pages = {121-137},
    year = {1955},
    url = {http://www.jstor.org/stable/1263939}
}