@article{JeffreysBullen1940,
    author = {Jeffreys, H. and Bullen, K.E.},
    title = {Seismological Tables.},
    year = {1940},
    URL = {http://dx.doi.org/10.1038/151472e0},
    journal = {London: British Association for the Advancement of Science, Burlington House}
}
