@article{226723,
      author = {Sarna-Wojcicki, Andrei M.},
      url = {http://library.usi.edu/record/226723},
      title = {Chemical analyses, correlations, and ages of upper  Pliocene and Pleistocene ash layers of east-central and  southern California /},
      publisher = {U.S. G.P.O. :},
      recid = {226723},
      pages = {iv, 40 p. :},
      address = {Washington :},
      year = {1984},
}