@article{Herrin1968,
    author = {Herrin, Eugene},
    title = {Introduction to “1968 seismological tables for P phases”},
    volume = {58},
    number = {4},
    pages = {1193-1195},
    year = {1968},
    URL = {http://www.bssaonline.org/content/58/4/1193.short},
    eprint = {http://www.bssaonline.org/content/58/4/1193.full.pdf+html},
    journal = {Bulletin of the Seismological Society of America}
}

